Malicious PDF — malware analysis report

Static analysis result for SHA-256 6332afd368d021d2…

MALICIOUS

PDF

79.7 KB Created: 2021-04-14 11:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b44aad5af71424bb87660cb23db4612 SHA-1: 932be63b6ab2ef50b361feda25241c359499df7c SHA-256: 6332afd368d021d29ec8fe284c4a99c5c60261218f049e97ffb8bced7d1f4f57
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 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=laws+of+the+torah+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452863/normal_600cea3e33c56.pdfIn PDF document text
    • http://thedopemarketing.com/pugeke63d53.pdfIn PDF document text
    • http://rubeatyshop.xyz/94453409172ese1v.pdfIn PDF document text
    • http://dvestideyli.xyz/bapakumipevilixo0lmy.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/fapawisat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_603c488f93199.pdfIn PDF document text
    • http://biggymstoe.com/migekalasule43ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fd3792b8207e.pdfIn PDF document text
    • http://allieshouseofhope.com/did_ivan_drago_cheatxq5rl.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/44405919765.pdfIn PDF document text
    • http://hookup755.fun/samsung_galaxy_s3_through_straight_talkjnmqt.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/ekadantaya_song_mp3_free_download8dbc1.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/marketing_campaign_plan_template.pdfIn PDF document text
    • http://xtreme-sport.ru/free_brush_for_digital_painting8f6wl.pdfIn PDF document text
    • http://bluhgang.best/2248566082823jcr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesetunal.onlinewebshop.net/canterbury_tales_prioress_tale.pdfIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_1f95365a366541bc931b1f7c2f42ce6c.pdf?index=trueIn PDF document text
    • http://gepivefukusi.atwebpages.com/bookkeeping_transactions_tutorial.pdfIn PDF document text
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_32e9ea4d38484c688107005a20c8a3fd.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_0571297a7b3a49c3915f93ca413fe258.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_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 5064 bytes
SHA-256: 8cf651a076434564ffbc6184f872f25113b9a43c04667a3700f30d14d54b6dae
font_01_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 10604 bytes
SHA-256: 4ea386ccc9612f7dc38b810f6339e6f973fe89ed8942eb2563031963d7fb4d41

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