Malicious PDF — malware analysis report

Static analysis result for SHA-256 296f904f685c6d7b…

MALICIOUS

PDF

78.1 KB Created: 2021-06-07 19:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba6c3681ddd84b32d28a4b87ed4990aa SHA-1: f52be43ef52076fb4c22932334d3e081bf3270a2 SHA-256: 296f904f685c6d7b595d0affaaae7c5dfea24685552c9a2c716afcaa03b099f1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pixomot.ru/pbw?utm_term=can+you+cheat+on+your+spouse+in+kkh PDF link annotation
    • https://didejigoximatex.weebly.com/uploads/1/3/1/0/131070501/vurunugebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_603aad1ac9a00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393925/normal_5ffb45dd72bbd.pdfIn PDF document text
    • https://potigaguw.weebly.com/uploads/1/3/0/9/130969810/falulatofasejak-zamerarumor-katokimef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxasol.pbworks.com/f/7621297329.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144421581/93543761029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb83f64e-bf79-4bba-a63f-62b546b3b876/weber_smokey_mountain_18_parts.pdfIn PDF document text
    • http://garigor.pbworks.com/f/eye_defect_corrected_by_artificial_lens.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/w/file/fetch/144699801/kalnirnay_august_2020_marathi_calendar_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456c1c9a-fa9b-43f9-ae28-dd43be24d12c/gibirabosidaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e98d14-5ad6-4deb-bd31-3c5d9ff48676/how_many_times_should_i_workout_to_see_results.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/teri_ankhe_bhul_bhulaiya_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2194591c-b996-46b6-9ff7-9ce111e6b6e4/how_does_the_maze_runner_death_cure_book_end.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c4b97e-1702-4ee9-a58a-62c73a4b452d/51549042761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4ff00e-423e-4ad0-a736-997127776fc0/39261495873.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144459267/adjective_and_adverb_clauses_exercises.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/38943789680.pdfIn PDF document text
    • http://japomajuxire.pbworks.com/f/need_for_speed_undercover_pc_game_registration_code.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_off0000f5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 5060 bytes
SHA-256: d1cbfb43bb45ecc2b50ac07b009bae017be4f50304fa720862d83128d2ebe7c0
font_01_sfnt_off000106fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FE 10648 bytes
SHA-256: 4a62f3b6779fcf76958cd48dba9a863eb59fbd8b0a2b1f4d74e2b47f6a75167a

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