Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f60f46d6d19b02c…

MALICIOUS

PDF

98.7 KB Created: 2021-06-11 09:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f2140d6236020cea79ca3ee7d991cf93 SHA-1: 6a670068368ccb517863ba4063327241955a57d3 SHA-256: 8f60f46d6d19b02c975aa622513e84cd54774743661abfe50c29b8f915d874f5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by both ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or SEO manipulation scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or redirection attack, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • 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://wastran.ru/pbw?utm_term=what+are+the+different+kinds+of+fallacies PDF link annotation
    • https://jebigifapiw.weebly.com/uploads/1/3/1/3/131379276/xebemam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5fe4d361adc36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_60170867c7b22.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/dorepejolatu-kikamavefiwa-baxokop-namewotexivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_600f346ec6fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_60b9b5074ff2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_60525618650e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_6062bc7c8ef59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729dc1fdb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_6046292416883.pdfIn PDF document text
    • https://lifufamaz.weebly.com/uploads/1/3/4/6/134685481/b47c6354712f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_60c2d4ff2ecbd.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/bolosejuxetofeb_begob_juxakegoz_jikojas.pdfIn PDF document text
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/xeligedufomuraro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64faf6f-f1a2-43d5-bd84-7e43bb8898a4/69077113461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cca221c-c307-4e99-ad7d-2c4bf113214f/biriwijavukif.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/w/file/fetch/144964869/vedic_chart_report_free.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/chanakya_niti_book_in_english_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25f87f8-fc22-4e28-a90d-1bd6adcbbe22/vuvori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023829ac-b2ed-4300-8db0-42c2a226ca21/6482642231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b30dec5-2a88-4540-9afe-ee2e178259fc/wefazuwesekoninefibifavug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05aaa8df-36f0-43c9-8648-f6cb1740d31b/7178030909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d8a3a6-98eb-4f9a-8b6c-10e7b1e83962/rizaladawuvenugejomudenaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fa2adb-0c4c-4a4c-b43f-69e8da84d40c/bojibujezu.pdfIn PDF document text
    • http://bavudexote.pbworks.com/f/ropedufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d316a640-9981-4a42-95d6-ebeb2891d0a0/ap_world_history_timeline_1900-present.pdfIn PDF document text
    • http://fuzujufod.pbworks.com/w/file/fetch/144877692/61487004241.pdfIn PDF document text
    • http://ranetowunose.pbworks.com/w/file/fetch/144716601/formulas_para_convertir_pulgadas_a_milmetros.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_off0001473c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473C 5184 bytes
SHA-256: b29d7c93c9b1e452ccc8ffcd71de050dac6ae3403ef751e7d0551a2479b73926
font_01_sfnt_off000158ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EC 10536 bytes
SHA-256: 3207443b8154ce01182163b2e087b374b5976f4e1785421913f8f0bc972553af

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