Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17a37182d1ec195…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 06:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75f8fcfc1d804dcb50ade626125cc873 SHA-1: 14ec076f59b4e837f1fecf29e6a0aa500836dc26 SHA-256: a17a37182d1ec19543ad02027c4f8ea9dd4d9ca128e0d14767bc40aa0f6940b6
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 0.9998

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 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://soxebez.ru/123?utm_term=us+passport+online+form+ds-+82 PDF link annotation
    • http://compte-cmbretagne.best/feedback_form_for_students_templatevrqht.pdfIn PDF document text
    • https://zuduwejigorim.weebly.com/uploads/1/3/5/3/135329148/wakafadu.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fieijgf/frases_motivacionales_para_una_vida_saludable.pdfIn PDF document text
    • https://mavukaral.weebly.com/uploads/1/3/4/9/134904766/3537122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_601878bc2fe26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_6036c22daec08.pdfIn PDF document text
    • https://zuxijonimobazi.weebly.com/uploads/1/3/5/3/135351106/vododisolev.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/jeJhfjh/gta_san_andreas_fast_run_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_604154cdeff87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5fdb1c6056717.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/hgchbsf/csi_las_vegas_episodes_guide.pdfIn PDF document text
    • http://popularchoice.space/bibi_fatima_ka_mojza_in_urdun7vcy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_e1f1567d46574480aea3de574f2a918e.pdf?index=trueIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_a62595f79de04fafa038e555a8f12e3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94333958-31c0-4d84-b9dc-7c44ea09b57d/fazuvivagawejuvimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4bbf2a-7cad-42c8-b4ff-ca29b208e5a6/47150499070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb8265c-5a66-4c06-abfc-e431e6992be2/64694045479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463f2a3a-b40e-4a45-a544-c61fc375e925/51346175491.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_cde8c558a52546408ddbc4964ac17558.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac59cff-d6f0-442a-a5b5-06f43a8c3ceb/dedexapotetuzarajix.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_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5536 bytes
SHA-256: 8e1af985a26c7c9ae2570bf3f653c8f2a2750dd11f0b3ac7d704bcd35554d4cc
font_01_sfnt_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 10768 bytes
SHA-256: 4d51d086c80dcf07def7912ff7906bde155c8763a5f74d40a1fbd4c16034557d

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