Malicious PDF — malware analysis report

Static analysis result for SHA-256 3278b733fbc327c4…

MALICIOUS

PDF

70.7 KB Created: 2021-06-08 09:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 224a3a0325da314bf1822726a301d631 SHA-1: 91c04a20d4ce2d2b48adf64f4f5877a5ad8ef6f2 SHA-256: 3278b733fbc327c42791bdd2e2696a9ac29ff6ea03779867372a3fb72b250aaf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crewmak.ru/pbw?utm_term=dibujos+para+colorear+de+princesas+disney+kawaii PDF link annotation
    • https://kenopawubiwo.weebly.com/uploads/1/3/4/4/134459696/perivuzusubenerowa.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/8162985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_60126dba2891a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_60170e3d18440.pdfIn PDF document text
    • https://pimelitapata.weebly.com/uploads/1/3/1/4/131454500/67f98a638c.pdfIn PDF document text
    • https://fuviwezajoz.weebly.com/uploads/1/3/1/3/131379384/3043701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_6068e62cec3fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144424077/guia_super_mario_bros_nintendo_ds.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/what_is_the_definition_of_anomie_theory.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/dragon_city_apk_hile_indir_android_oyun_club.pdfIn PDF document text
    • http://bobiginokemo.pbworks.com/f/rugeloliridos.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144807030/beginner_5k_training_plan_3_weeks.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/nupatokifesemob.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/45849733965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962f4e5a-a971-49ae-b014-6dbef7a45611/64513179533.pdfIn PDF document text
    • http://xigivesupi.pbworks.com/f/5_ways_to_cite_textual_evidence.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144433881/ielts_academic_past_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b39bba9-0b49-470a-9719-07f9b7dd0b4d/scid_5_cv_refill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6caff236-25c9-4c84-9d8c-8b0fd8cafe0b/43299562343.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/kawasaki_bayou_400_4x4_service_manual.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/w/file/fetch/144443976/xesimarakunexapixo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 5344 bytes
SHA-256: 394d5f9bc4836c07205e16ff7f8b9bd0948dbc2bd047e77627d7ffd9b3457d67
font_01_sfnt_off0000de8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 9568 bytes
SHA-256: 4bc3375e94434a31b53f85df612e4c3b81014e4a8723aec5614a8127087474df
font_02_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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