Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d020e7629c4908…

MALICIOUS

PDF

94.8 KB Created: 2021-07-03 21:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ee21f08950596ece7c58f570af99397 SHA-1: a0c85814e17f2c038d209791473fe1d7b6491eb4 SHA-256: 74d020e7629c4908203315c45e88dd2a4bb0cfdb41b568e1e154519d4d57ee07
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised WordPress sites, suggesting it is part of a link farm used to distribute malicious content. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic suggest a phishing or scam attempt, likely to trick users into downloading further malicious payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c6c68d20f---5246865479.pdf In PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/bitunagazipavo.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98e62525fd---xakukopa.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3bm4njsj3cu9956ffl05ehrm21/61218424884.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8cc227c2---47998113368.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/fabaga.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb80a2212---95685523956.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/12091335428.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af87aa04f4d---12979148721.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fa6cef65627c851953f04304ded780ba/panizemujikogazawa.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcb8bcbbc3---nabikimimevitigit.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609861f2963f6---71074066688.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/87611057533.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/xonowemagugepokuropupipe.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/12225428823.pdfIn PDF document text
    • https://avvocatoboretti.it/file/97494821150.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9d988dc8eb51f6bb07ecc23a1b7d14ba/38208658947.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/nmt1ff66cpprg081gd53tsahm0/xageniwuwajibivuvilatujo.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/1f906adf76164079c6eb3e9275a525bb/10488280177.pdfIn PDF document text
    • http://hydrem.ru/images/file/70867135536.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/816a0bfdc493d50917dbdb9659c38b16/xizojirozezowekekovopos.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/0gtsc91olgasnqt8t5a3oi9lg0/lugutina.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/03741637998774ad05eb8c2368988b79/mutozosuduruganalovur.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/9204613300.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/90c547cf15138c48843189ab9d84a686/fezorudokegiboza.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d5b6966c26775468218dd64198f81eec/nasujuvoruf.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/xenixizagofexaganofuxomup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mirror+lake+scenic+byway+mapPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 17868 bytes
SHA-256: 9f1081f2df9d63c58c3910c00a4eda6c3592656929279e1d8455fb115685a1bd
font_01_sfnt_off00013c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15495 10864 bytes
SHA-256: d2b6488bea6551d09c636cd838b303a9c8aefc7217e028eeba2ff7e31852309d

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