Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b888965456da186…

MALICIOUS

PDF

77.9 KB Created: 2021-04-01 07:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 080af2fe333a5373d8f9d01d841f76f9 SHA-1: 5b0603834367f63062f9feef48ac14ad18cd76a5 SHA-256: 2b888965456da1861252634b529e804fc6a720de8d14274af062cad37bebee23
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 0.9993

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://resalured.ru/award?keyword=l+ancien+r%25C3%25A9gime+en+france+pdf PDF link annotation
    • http://smartradiobf.ru/how_to_use_hemani_pomegranate_oilgsy62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473039/normal_60064574e9885.pdfIn PDF document text
    • http://steelsho3.club/320554212307ee11.pdfIn PDF document text
    • http://vclean-sale.shop/what_is_a_masters_in_educational_psychologynm20g.pdfIn PDF document text
    • http://fbcopyright-center.com/shooting_targets_for_sale_australiau194c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465125/normal_604dc49891978.pdfIn PDF document text
    • http://claire-irk.ru/50272813256gel7m.pdfIn PDF document text
    • http://sallehub.xyz/62090940248g458i.pdfIn PDF document text
    • http://starconflict-game.ru/240119174542awmc.pdfIn PDF document text
    • http://antileqphh.site/79206604372f4acv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_602b589558e93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_6019c6ac03736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404727/normal_6026bf597f623.pdfIn PDF document text
    • http://ek-arenda.ru/aragorn_mobile_wallpaperx8lh1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_17f9e9a23b8b4f22b4469361a5e4e347.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/laradusa/juxemoxatozeta.pdfIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_273f5d752e6d43b0a6484dc49a9fcc58.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_0c77ddb8efa04754b7b168a2a3d19c41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/swiffer_wetjet_wood_hardwood_floor_mop_starter_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/questions_about_theme_of_a_story.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/whatsapp_plus_2_apk_new_version.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_894d293de3714aee8b010c876a466de8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/dapofenuliwiw.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_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 5348 bytes
SHA-256: ba7b4ae9146da2e7807796aac69f14e66d4c11e18021715786141ef76cd1a788
font_01_sfnt_off0001037f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 11232 bytes
SHA-256: 9bf6b21bfa31a6d58d6c00362a36dad02499121c8339435279173fafbd1f43c6

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