Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fa932013bc4806…

MALICIOUS

PDF

88.4 KB Created: 2021-04-13 09:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dde31173795a7517e77641db510d64a7 SHA-1: 3e9ba3134665856256dfbb86cc3e98c447c15baa SHA-256: 06fa932013bc4806ad95e9d121b457b7ae820e93e4bf10bc77c965030596fd72
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'golowaki.ru' and containing a 'utm_term' parameter suggesting a tracking or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a malicious intent. ClamAV also detected this as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=gps+garmin+montana+650t PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417659/normal_601388c6edb5f.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/lixumugolejewa_bajibedif_sutufoxowi_xisufimuzupap.pdfIn PDF document text
    • http://roxobupupop.22web.org/demeridozo.pdfIn PDF document text
    • http://uanews.website/47840832477kerdi.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/29920981743.pdfIn PDF document text
    • http://sarhello.online/jisowofifuteditesuvi3z7v6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_5fd77052857d3.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/wikigakosifimos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mududexabaxame.epizy.com/86480108242.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/tupuvulesojoxolu.pdfIn PDF document text
    • http://vikitadutuxorus.rf.gd/what_does_the_word_truth_mean_in_hebrew.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/weight_training_guidelines.pdfIn PDF document text
    • http://xakafof.rf.gd/54728546126.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/difuwirobalavi.pdfIn PDF document text
    • http://pobunutad.epizy.com/72148031836.pdfIn PDF document text
    • http://fewebife.rf.gd/best_uchigatana_build_ds2.pdfIn PDF document text
    • http://vugoban.epizy.com/bromus_catharticus.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 5556 bytes
SHA-256: f13a918d957e14ed10a1fda8e5edc3351ca142a095a6fe432e0b92b30285b6ca
font_01_sfnt_off00012e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E42 10940 bytes
SHA-256: cb9bdc9c45f48cff334cd2a282dee466478f505f49c88886739e20781af765a4