Malicious PDF — malware analysis report

Static analysis result for SHA-256 9488b680b913b062…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 21:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 37964e92c010d06b46dde46989c8dc80 SHA-1: b8a473d17daec317aea134666305616e12c3a4b4 SHA-256: 9488b680b913b06258deefa3d678c927059cca5b48a0d2759650fc66f4298eb6
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=food+product+specification+sheet+template PDF link annotation
    • http://sokuzise.iblogger.org/xobetafevix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5ff1dc6f362c6.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/YCNTAJ2/160006613.pdfIn PDF document text
    • https://cdn.sqhk.co/nivavepe/jieEojb/weaphones_ww2_firearms_sim_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_601ce4183a9a0.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/ihjf7ie/free_distributive_property_worksheets_4th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_601fd3f1935cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_5fe9379768082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_6036994e306e5.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/jjkj1if/windows_10_build_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jawakagufu/hc38gjQ/75542899595.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/4idD2dm/tire_chart_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/Rhe9hhg/shamans_pop_bubble_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/ehogdja/7402408147.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/eggKB9I/lujapusixovemevur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6025c5a73b9db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_600c9c3e22d1b.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/b31394ff-f86d-4731-a8c0-8e662468a27e/e-myth_summary.pdfIn PDF document text
    • http://bajivuselome.epizy.com/nasosebifegajovojaketen.pdfIn PDF document text
    • http://jitapalerex.rf.gd/amadeus_rivista_cd.pdfIn PDF document text
    • http://zezewesiwakoruw.rf.gd/juwowinepibafevos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373b3ad4-9ef8-4ab9-bc25-4b2a127b3d72/78112703614.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_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 5352 bytes
SHA-256: 250cf7140576e9d6616311a4d43c2b85db52659960f5485e633c66eff3f7fa49
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 9964 bytes
SHA-256: 614acccbcf4564ded4079ac23b0772e3341f62e184e756b8457af9878a571807

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