Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3fe64b8aa35717…

MALICIOUS

PDF

82.2 KB Created: 2021-03-29 06:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf7a5b8ec53e36a57ea9b73d817f4279 SHA-1: 52fe3699acc9243844890881215479cb76926956 SHA-256: 4b3fe64b8aa357178a232ca88efd94f731b7f57e1d1d07c264af36430f8ccfce
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 0.9967

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://bologen.ru/aws?utm_term=summary+of+merchant+of+venice+act+1+and+2 PDF link annotation
    • http://lifolibi.sportsontheweb.net/zagomibisupavavovalovamar.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/0q95Uig/trending_video_status_share_chat_sad.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/51248591962.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/1gehdif/wavepad_audio_editor_free.pdfIn PDF document text
    • http://rm-swis-mine.com/6467375323638pwx.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/UJ0LibR/gigulakidukaxiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502500/normal_60253c5551b08.pdfIn PDF document text
    • http://biomaniks.website/9495683424nl6pp.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/ijggijj/22462008734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_604163fa7e21a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_60533f0461b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_605846caa9c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5fdaf1ef39c98.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/photographic_memory_test.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/tazigikabonaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/cghhdgf/judgement_definition_in_crpc.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://vereffka.xyz/wojna_polsko_bolszewicka_przyczyny3q4xv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458407/normal_6061389db959b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453734/normal_5fc6703c45848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/xevulijulebanozanupubub.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/love_me_if_you_dare_movie_ending_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/how_is_deepak_chopra.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/operations_management_stevenson_11th_edition_solutions_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/13337918500.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_off000103c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C6 5500 bytes
SHA-256: a7a40bc47167ea243a3b80956b7206d68cbbc08be75d8bf85132bbfaec331d47
font_01_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 10772 bytes
SHA-256: e82f6559ff967bce10bcb05daa12357e4d5f1a217194589e1ae60b8ce484446b

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