Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffd6a214e912706…

MALICIOUS

PDF

75.2 KB Created: 2021-03-21 08:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: edd71a519d47d64f097d16259c64b483 SHA-1: 01b1a9fdcb8650fd11317255b86e2e09549b67fc SHA-256: 4ffd6a214e91270644c04330e5b721c39bd28b2247761a1349525c0be9130e0e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URIs, many pointing to disposable hosting, and the 'utm_term' parameter suggests a tracking or redirection mechanism. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, reinforcing the malicious intent.

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=the+ugliest+person+in+uganda PDF link annotation
    • https://cdn.sqhk.co/tigixexaxi/gdYwheP/razefavijitilotija.pdfIn PDF document text
    • http://dobewobezusisof.iblogger.org/bacolod_iloilo_guimaras_travel_guide.pdfIn PDF document text
    • http://dikoxikikalonib.scienceontheweb.net/counting_by_7s_book_talk.pdfIn PDF document text
    • http://eurostore.info/tie_knot_meaning_marathiir135.pdfIn PDF document text
    • http://fb-ig-violation.com/wijegit4a193.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/61494111709.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/djjohak/lofere.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/gd6kKib/83353925241.pdfIn PDF document text
    • http://kigapoxifaxixem.22web.org/wevekomejizixetobeke.pdfIn PDF document text
    • http://bepevekebezupu.22web.org/73015724396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488804/normal_60055986cf212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481422/normal_5fd222cc3a6c6.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/igfjfKe/68273792162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417543/normal_5fc5f6efd6699.pdfIn PDF document text
    • http://tiwigibafofovit.iblogger.org/binder_divider_tabs_template.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/rajanubi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/376b2949-a552-4f66-864d-2f67119f3407/crank_ellen_hopkins_book_free_download.pdfIn PDF document text
    • http://kavezusi.onlinewebshop.net/37459146401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f7507d-d212-45f8-80be-a29faa6f4521/how_can_i_see_my_starbucks_pay_stub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b8003c-7938-4844-b981-b8c5297492d0/tales_of_the_unusual_raw_chapters.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_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 5172 bytes
SHA-256: 5a95362979e702fea8c7a4a91648f3d0d7ad431564462daf08260713c294e83e
font_01_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 11028 bytes
SHA-256: 735ec5fd53d746b86485b5f12675475d6fb9e673e3515859b51bdf7af023f690

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