Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ca967dc197e858…

MALICIOUS

PDF

80.3 KB Created: 2021-03-21 11:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6c879ddc347b89cebce258d20e1a8153 SHA-1: d602a0ef1264c195fe8d35101f0c6b92d06e3f5d SHA-256: 49ca967dc197e858ee4d7c2b1827d7e5a75f46398df7741f83eea73fc4cba3bc
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 0.9994

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://dafemum.ru/123?utm_term=free+bittorrent+movies++sites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530457/normal_601731e0f3916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_5fe8b322dd514.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/97282248040.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/68619328705.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/how_to_turn_on_arc_on_denon_receiver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_602cf58221d2b.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hi16geX/perinijoxadobowujaxima.pdfIn PDF document text
    • http://wutugidejavazu.scienceontheweb.net/kanugoramoxidubozexep.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/RZuRNR5/super_word_search_puzzles_baking_christmas_cookies.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/fZTdHgf/956974883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_603470eda20cd.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/imiclgc/36372513469.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_5560d9f02bb84febb4c2e88dcc2a9c8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69959c9d-904c-4773-9df5-cad2832947f5/bulova_98b229_precisionist_chronograph.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_1f8e6af2023949cc98964e1e6cc0e7fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc71157-5f80-475e-a7c6-99db9d2dbbf8/how_i_became_a_pirate_preschool_activities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70871d56-2325-4ec5-bf98-3fe5c099f705/el_arte_de_amarte_por_nappa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c040f3e3-95c6-4db2-abef-21e4fc6156cd/a_dolls_house_act_1_summary_short.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a965421-ef93-4d6c-bb62-0b0ee1881f97/68375902822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bc2fcd-092b-4c96-b950-2acdf49f02f0/schlage_s480_digital_lock_review.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/50225896349.pdfIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_cb97a511ce104bba9da286477a8e6312.pdf?index=trueIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_4c42eec32e794d6181cbd352261143e7.pdf?index=trueIn 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_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 4744 bytes
SHA-256: ffbe54b417c1e5381c7959e688ea93294e2cf65bba1e207913b97eca17ff1398
font_01_sfnt_off00010e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 10984 bytes
SHA-256: 51fa49a81215173bd0536ed5dfdd5139141b7d7a62a74f721335e202b7f00687

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