Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e9670875c2d0eb…

MALICIOUS

PDF

83.6 KB Created: 2021-03-23 08:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec68de9192c3f71490eb79fa4f55004d SHA-1: 8cafbf912a60b8cdd7533f7c0933f18038088e87 SHA-256: 85e9670875c2d0eb704236d681220deaf44144ecb33ce2a961d4dc5c7db83dc7
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 0.9991

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 http://wowirozunofifo.iblogger.org/25560526706.pdf In PDF document text
    • http://bupatinewesep.66ghz.com/rivarosadadazixad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fdccfd2b02bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488555/normal_5feb9b10d0e00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_604362ecc51a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60357b13a2453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_6027c1e771988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_6025d0d8445e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_5fef50541b29f.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/ifIiajb/76118455356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_5fe9a5d0b2d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_60132a655fe52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5ff527dc1fea6.pdfIn PDF document text
    • http://bojosizupopope.22web.org/zanenef.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/qihgggc/aws_iot_architecture_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=best%20lens%20for%20olympus%20omd%20em5PDF link annotation
    • https://uploads.strikinglycdn.com/files/85c05b9c-2e34-4f0f-abca-3d4d07a172b5/how_much_is_a_netherland_dwarf_rabbit_cost.pdfIn PDF document text
    • http://zubeleboju.epizy.com/yahoo._com_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ce288e-63a8-45d7-b684-1a8e35f5cb1e/grammar_spelling_and_vocabulary_-_activity_book_-_grade_4_answers.pdfIn PDF document text
    • http://lajirino.rf.gd/top_o_matic_not_working.pdfIn PDF document text
    • http://jedejuleler.epizy.com/capecitabine_mechanism_of_action.pdfIn PDF document text
    • http://nafebuxu.epizy.com/the_book_of_virtues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a17384-3537-4f55-b865-d0f1395d4245/34741653027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac050f8-0cc7-4e5b-9625-c45a89bf1f55/74450012030.pdfIn PDF document text
    • http://jarafaso.epizy.com/gk_power_capsule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a4a0a1-687a-4ef4-bad6-4bb4a01b128d/addition_and_subtraction_of_fractions_with_like_denominators_word_problems.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_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 5252 bytes
SHA-256: 8ddc87c5ecad44e0a4812c8806fb5cd1f030da42c405d8f195f87747bb0d53de
font_01_sfnt_off00011929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11929 11324 bytes
SHA-256: fcc29dcbeb15ff1f9b4b3f3b51a5a4aed7205b794d53fff6f08a5b226ab6deb0

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