Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d104a63844323c…

MALICIOUS

PDF

71.5 KB Created: 2021-02-17 12:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fdbfde773256a3803795bc3b25246ee5 SHA-1: acea132f304f3a8a9536e0946466473d1bbfbdbb SHA-256: 22d104a63844323c16a68a3cb30a80a895800a626cd04cc3cb247e5b8196050b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external resources, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=nba+apk+for+firestick PDF link annotation
    • https://cdn.sqhk.co/pizililiv/jIXpOrT/83309682067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480588/normal_5ffa3ca3e8728.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/ijj9mhd/fegetozexafivoxosej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_600dfae7ee109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_600c6bb3319a6.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/e8aRzie/8412793305.pdfIn PDF document text
    • http://medway24.com/beginners_book_of_modular_origami_polyhedra7lw7q.pdfIn PDF document text
    • https://cdn.sqhk.co/jawakagufu/hk56pEH/94333994682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445334/normal_6000c832111f9.pdfIn PDF document text
    • http://store50off.info/linen_sheet_set_kmart1c4bj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_601e48f166da9.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/d1Mh4z4/bowling_pin_shooting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_60202721a7725.pdfIn PDF document text
    • http://getplafond.xyz/satire_used_in_harrison_bergeronyjt4v.pdfIn PDF document text
    • http://dabuvede.66ghz.com/vetarirus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5ff6be8eaca23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_602574a5d667f.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/7bOiieY/office_dress_up_ideas_for_halloween.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_6020fdcb2eae0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutududigerupe.epizy.com/88786079731.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/8000682692.pdfIn PDF document text
    • http://belavujelu.epizy.com/advantages_of_using_technology_in_education.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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5152 bytes
SHA-256: c9ed6a168b5a77024c19d2ca518998b9d71067d188995f36aa1d21ca8ff34dd0
font_01_sfnt_off0000ed72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED72 10428 bytes
SHA-256: 24b43c6d8a77ccaba5118e39ca754c387561dafa0cde168cb2568a6099157b12

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