Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e689678a5f8ea5…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 16:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a3d37e8a7ec8d6dec40b02b80fadefce SHA-1: d9ed078d678fcbae8d8c519458673a8a89d93f87 SHA-256: 92e689678a5f8ea5e2aed3bea6bece65b9ba3fc9d957fc86eb957a26aec70345
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate that this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ede4c24b0---tiwuxipatowelejamabam.pdf In PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/9174e8d5e42108bb979cfae8478304af/mafazuvidexeso.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/uj03t0ut7ahd7d8vs60kma4q6t/mogezegefojififikimek.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072171d0529b---60811188245.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cc847f4d5---wuzideginalis.pdfIn PDF document text
    • https://invest.pl/userfiles/file/wepibizinodidadu.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5292151a8---giporokokiv.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/65958873658.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/xirijulirinelelon.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/jenodevotixepitewob.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160780eaba4ed5---79250242506.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c23ca31474---nedolagiresekojemove.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/25583709890.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/19967267443.pdfIn PDF document text
    • https://iwistw.com/upload/files/seviw.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b359643823f---tuxevobabeviruzegibulalex.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084afe5eac0c---kijebinitopojupebudibigu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079a7dcaf69a---62145348467.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608af0b8cc4d4---64761551809.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607007d5aa596---96789987995.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adabf11e24d---tugubi.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087bd23e14b2---82043806282.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/zaperakimekurumutuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=meat+science+book+pdfPDF 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_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 16960 bytes
SHA-256: 593ef8688b9bc3ad2046d25ae2094ee7b7bf9adb4dc485f7046a8ac4d5616bfa
font_01_sfnt_off000117cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CB 10692 bytes
SHA-256: 055f1e2722f79578a2419c17856df9c0e688729678330c6ed61efb71d30e268d
font_02_sfnt_off00013040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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