Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa8a5f239a50fca…

MALICIOUS

PDF

86.1 KB Created: 2021-04-26 15:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87d2db8243ba67276f589711fe25c219 SHA-1: 104b26b38bc3b91c713d2bf01c39b77c910c2bc4 SHA-256: aaa8a5f239a50fcaac5a279516631df21fe79bb90b0f8f58d6c5aa8c6f786137
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 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+make+a+5+gallon+copper+moonshine+still PDF link annotation
    • http://wonnaturila.space/74152471385oqvfs.pdfIn PDF document text
    • http://vash-fasad.live/fawufasopagupavovorojemegtw22q.pdfIn PDF document text
    • http://sesalon.xyz/beethoven_sonata_no._8_op._13_pathetique_analysis7sbj4.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/dphPCid/gokagili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_604ed849c4bcb.pdfIn PDF document text
    • http://esclick.pro/rokizom5f7.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/ie8icgd/80148345315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_6020d70bce4d8.pdfIn PDF document text
    • http://gbo.guru/46095311481sl3zg.pdfIn PDF document text
    • http://changely.club/will_they_remake_mgs1rds6l.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/eCOjjid/12084684436.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/jcHljd0/hide_and_seek_imogen_heap_lyrics.pdfIn PDF document text
    • http://datingdate.site/37058213553oji63.pdfIn PDF document text
    • http://microdigitalmeter.xyz/51494339523figl.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/jgihgKI/92430017189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_60131395743d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f6ed8b-186e-405d-a222-cd8d305b858a/favomewigupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54cc879-fc7a-440c-95ab-98f7e384be11/preposition_quiz_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd52bbad-4395-45c7-98a1-aecc6d2de14f/lixizaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/31028682799.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/bishop_s_hatfield_sixth_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2487661d-2cae-4977-9281-93c0c9a7571f/acurite_meat_thermometer_00994w_manual.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_off00010f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F25 5588 bytes
SHA-256: 2c1ce289c058b1239631aa7cd66d98c10dce3c241c0ac54f35469042e4e9db66
font_01_sfnt_off0001220e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220E 11448 bytes
SHA-256: 60e193659a8f0568ca2fb8137e226170496c573bafbed629bba805d39e602a06

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