Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e669b5ec31e785c…

MALICIOUS

PDF

80.3 KB Created: 2021-03-20 10:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fdc02e5b5674c71f8f3a04c1527f27db SHA-1: 2ed463cc7c2a38ba7d0f8b05428dbc1725acacc5 SHA-256: 8e669b5ec31e785ca7951cd49c4324cc77fb0266179bd80ef9f6cf65c289b06a
126 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/strik?utm_term=how+to+use+windows+movie+maker+pro PDF link annotation
    • http://monubagujizud.mywebcommunity.org/ccsk_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_60248ab496771.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/JjjBMy8/lepipimazujubumukujovo.pdfIn PDF document text
    • http://daimontimur.org/how_to_prepare_for_ccna_200-301tlko7.pdfIn PDF document text
    • http://penageli.getenjoyment.net/dorijavaler.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/fJANgeC/reincarcare_cartela_digi_tv.pdfIn PDF document text
    • http://begdas.space/13493693976nf8d2.pdfIn PDF document text
    • http://kelnoteres.xyz/adobe_premiere_pro_mod_apk6ec88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_603b4b7eec662.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/dvgjfZv/regency_theatre_in_perris_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/oqZshds/drum_games_free_download_for_pc.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/83277590845.pdfIn PDF document text
    • https://cdn.sqhk.co/rijuratin/dgijijc/photomath_plus_free_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/hgdjbXt/babozosi.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/NhaYhjR/lmk_anonymous_polls_for_snapchat.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/UHUiehf/33256554553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_6053057339cb0.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/kezod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jasunusemoki.onlinewebshop.net/html_css_templates_free_download_responsive.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/worksheet_mixtures_and_solutions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/can_you_put_a_chicco_car_seat_in_a_bob_stroller.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/46308866646.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF109 5132 bytes
SHA-256: 6e01d546fcb8245243a2274c9ba353fef0a166308b581ef079a7ed14ec0b9c17
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 10216 bytes
SHA-256: 25060d658e8621ec273252af9d08acea86bd58674e2a2e0ba94a932a746fd61c
font_02_sfnt_off0001256a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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