Malicious PDF — malware analysis report

Static analysis result for SHA-256 78030913ceef0dc0…

MALICIOUS

PDF

75.6 KB Created: 2021-02-17 18:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 07c2f713526c05535c8fd6e69834fca1 SHA-1: 20a6d3fe55d504409a120262a32cf695896815d1 SHA-256: 78030913ceef0dc00ce8eed665a5e2be1de7650ad0cab367b911bbd4b3d2692b
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-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://druttle.ru/strik?utm_term=merchant+of+venice+act+1+scene+3+character+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469353/normal_602b246509289.pdfIn PDF document text
    • http://draiwenstore.online/xozevoposalumijevu5bs2t.pdfIn PDF document text
    • http://shoes-storie.club/household_casebearer_bugguidearbdr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_6010aa4d977e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480403/normal_5ff90a3c591f6.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/yieiilP/zoomer_hungry_bunny_toys_r_us.pdfIn PDF document text
    • http://montana-media.com/duwipefi75l0u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_5ff3b56a90d3d.pdfIn PDF document text
    • http://getsalle.xyz/hueco_tanks_guide_trainingn8s0u.pdfIn PDF document text
    • http://razvivatel.blog/osmosis_jones_questions_and_answerswvyhu.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/easy_bing_maps_er_7._25v3l74.pdfIn PDF document text
    • http://meetsalon.xyz/misiruvva80m.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/ascf3Cu/15341055056.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/aicc_course_full_form.pdfIn PDF document text
    • http://cleaner360.shop/97479930336vwo3j.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/gib0YFV/pofumigoduvizapilavudeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421630/normal_5fe07d9fdcfb0.pdfIn PDF document text
    • http://kifokomuvaxof.iblogger.org/tofabiri.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/jiwisi/bergey_s_manual_gram_positive_rods.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/34854619741.pdfIn PDF document text
    • http://sewadereweben.epizy.com/kiss_the_rain_piano_sheet_music_free.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_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 5352 bytes
SHA-256: 8d3f6f4a12bbfe7e9e007906a18a88a898f337dc52815d016258da189696a3f0
font_01_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 10324 bytes
SHA-256: 3c1ba87e2feab4259d69b4532a565e11b79c2e75c77667350ba8f6f0b8343681

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