Malicious PDF — malware analysis report

Static analysis result for SHA-256 c048d448858422d9…

MALICIOUS

PDF

78.3 KB Created: 2021-08-15 21:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 08d65bc989ec16d0c5a33c57f9e8ee20 SHA-1: 042a1c09b5e62bf505011da38641a8f3170c61eb SHA-256: c048d448858422d98c9243fd034cfd2211345c5caafb566df2c023b4d0e8fa14
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting domains. The presence of numerous URLs, many pointing to WordPress upload directories, suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://ketchas.ru/uplcv?utm_term=dominican+republic+all+inclusive+with+airfare PDF link annotation
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16100fc878aa00---baromodo.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14681926714.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/dobelo.pdfIn PDF document text
    • https://limmaginebistrot.com/file/35001058255.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/fl3ev9c1ej7pavhr00qh5klvv7/42264367687.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/paruwalame.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/kivumujetat.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/xasefakifezusopalewej.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078c661df681---daninomejopov.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608688ecf1a73---zarinugevunusunibijazef.pdfIn PDF document text
    • http://abpaluso.com/upload/file/92377046558.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7cae9b8d---rovabolaguketegapivupu.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/20412304043.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/rativez.pdfIn PDF document text
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/46554282099.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/20126199974.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adacade45f---newubi.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/fugorugilewuduro.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/phg0f7gr8trq2h9o6pp36a9v84/fezubilafugesifaxuvik.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/vibevowemijaj.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609524eb762ef---zujoxopuwarikunigekovu.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f024bf30fda---woxeled.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/58250832014.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/3182549419.pdfIn PDF document text
    • 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_off0000ce2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 16688 bytes
SHA-256: 249cf82eda99c364bc79cfa6c7ce0d42337611a9a4b1d64e3899c69d21662e1d
font_02_sfnt_off0001116c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 11136 bytes
SHA-256: d1c699d372596d77e790ec795dedca04574eefe5c1732d75c11c01f1583a2b76

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