Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afcfac804bcf0e1…

MALICIOUS

PDF

75.2 KB Created: 2021-01-23 09:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: dbf043540d54c9f846c0743a66e4d087 SHA-1: a8724df44eb711ba13f9a8a8f62112400397f05b SHA-256: 5afcfac804bcf0e19693fbb0f4bdb678920734a926ea4abffbfef2091684de36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. The document contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=martha+stewart+pot+roast+ragu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371790/normal_6002d2d862c80.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisoritet/asfEHhe/92183310890.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/zgfuOjj/22816375982.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/bhjhcgd/86537862357.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/2198d.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/YUhhPhc/etrade_pro_vs_power_etrade.pdfIn PDF document text
    • https://cdn.sqhk.co/guposidum/GjggieQ/wanef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488101/normal_5fe56f7b3e958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453329/normal_5ffb22668c9f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5fc834337c688.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/yijuqjc/torn_meniscus_brace_after_surgery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fe833c48bacb.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/iiOZHge/animal_cat_ringtone_download.pdfIn PDF document text
    • https://kilizilefepik.weebly.com/uploads/1/3/0/7/130775254/8611662.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5144 bytes
SHA-256: 876fb17b6854b8d7c5100ea637cfdc769896720e0ca7cbab2ca6dd51b28b78c8
font_01_sfnt_off0000fa99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA99 10792 bytes
SHA-256: c5614623f6abff58aa93e7bd8b41c72df74328ee883957b1a08fc9a7d636b56e

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