Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7088e7c78f6a86…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 10:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f417d1b85940f24c524dd9081be26d7 SHA-1: 8347ebdc1fecacc95e439bf9bf68fc322433e413 SHA-256: ad7088e7c78f6a861bd7e99ef5bac69e7f783f8bf11eed0b3645f493eefe812c
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 0.9997

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://jottigo.ru/strik?utm_term=what+is+the+most+accurate+bible+today PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481166/normal_600f17a59e31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_601e4213a974a.pdfIn PDF document text
    • https://wemijixug.weebly.com/uploads/1/3/4/8/134888196/788221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5ff2dc1557583.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/ieQhfhe/how_to_save_orange_juice_for_long_time.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/72625799816.pdfIn PDF document text
    • http://thrivewebs.com/vinsanity_90_day_shred_review7aygx.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/zudajogimeriwuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tezikegoj/jgijaid/43962586015.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/xebuxuwitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449614/normal_60101e06d1870.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/65589346200.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/gdR8jfG/jopekozukame.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hfgeiiT/fidugotinobaruwup.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/tokemox.pdfIn PDF document text
    • http://hq-cleartv.info/regression_testing_template_document3kz72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/fender_gb_hot_rod_deluxe_112_enclosure.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/lalobiru.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/bb_racing_mod_apk_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/loramikumekubokenateg.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/mozid.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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 5436 bytes
SHA-256: 7a60fcd1ec4c3d35a5b30f9ae0c6a786f85bf703f4ac36a03fb08ef8b1306ac3
font_01_sfnt_off0000f54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54E 11176 bytes
SHA-256: 0a28bc8fa3ef3d869a231fe90aec31698e58ce8298a1e1a53035b465af197a06

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