Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ea4b046c1976c3…

MALICIOUS

PDF

75.0 KB Created: 2021-06-14 00:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 925ce0f4916106c7e581ca0fdae4a232 SHA-1: 1ed8b33893269a3c7ad1c1209453ae395410c979 SHA-256: 03ea4b046c1976c3aa6293671a5dbcfafafb85812185251f46f33d237920665a
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 0.9992

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://crewmak.ru/pbw?utm_term=how+to+convert+two+files+into+one+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462374/normal_5fe34934ac579.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/2419880.pdfIn PDF document text
    • https://wudavatu.weebly.com/uploads/1/3/4/4/134457778/8a21004e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_6047e3c88977c.pdfIn PDF document text
    • https://tigubitutonoxib.weebly.com/uploads/1/3/4/4/134476812/7234550.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/rupugiwuk.pdfIn PDF document text
    • https://jasevumoxemu.weebly.com/uploads/1/3/4/7/134707335/6904579.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zafobagusaz.pbworks.com/w/file/fetch/145142772/kinojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602e14e8-777e-4da7-8d37-b8e7bc6f4d9c/17897712458.pdfIn PDF document text
    • http://razodegotit.pbworks.com/f/how_to_determine_bulb_size.pdfIn PDF document text
    • http://kemususi.pbworks.com/w/file/fetch/145250364/website_with_textbooks.pdfIn PDF document text
    • http://guwodav.pbworks.com/f/what_is_your_mars_sign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ce98bf-ef56-4892-b458-9a14a363edb2/48490109797.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/saoif_farming_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1c9753-2e47-447f-b121-ddbc75e55b22/81411958955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e9f20c-07f1-4ded-9f73-49a3f52a5000/chess_board_jigsaw_puzzle_solution.pdfIn PDF document text
    • http://fafevupu.pbworks.com/w/file/fetch/145169877/courageous_full_movie_free_online.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144913725/injustice_hack_mod_apk.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144747894/82477240693.pdfIn PDF document text
    • http://sovamexor.pbworks.com/f/filetamizibur.pdfIn PDF document text
    • http://ridelox.pbworks.com/w/file/fetch/144779262/rumekewewowod.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144608883/why_isnt_my_pellet_stove_turning_on.pdfIn PDF document text
    • http://subazim.pbworks.com/f/37201661619.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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5052 bytes
SHA-256: 9ca63c3cfefe87efc18b39e3eb57529c0852535bca3dc4a9136d41f92ff254af
font_01_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 10972 bytes
SHA-256: a4d32460fedf7475cf2a037a3884580e71a79d5612fbd7f5ffb5b737e9fcb02c

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