Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ba0adbeb4b1489…

MALICIOUS

PDF

100.6 KB Created: 2021-02-26 20:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2043b9974c2e1935d0b455130da21ecc SHA-1: ed0e83d3bc3b3d290d6b84275e5b4fdf8f900430 SHA-256: f3ba0adbeb4b1489459cb86a60e3b5ad8459037dfd06e8b56e1e3d7847c2a1c3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to disposable domains, disguised under a seemingly innocuous topic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/aws?utm_term=best+way+to+stretch+before+lifting+weights PDF link annotation
    • http://exampl1214.com/scope_of_work_sample_templateja5t0.pdfIn PDF document text
    • http://soldonlakewood.com/the_intelligent_investor_free_download92eh8.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/posetidigugumi.pdfIn PDF document text
    • http://originalhallyu.com/gonepozakivaboram3qyo6.pdfIn PDF document text
    • http://copyrightproblem.com/daniel_powter_bad_day_songfactsap5r8.pdfIn PDF document text
    • http://umniashka.ru/manual_canon_eos_6d_mark_iilbjn7.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/ceremonial_of_bishops_onlinejievg.pdfIn PDF document text
    • http://wbigs.space/retinopatia_hipertensiva_fondo_de_ojoegjcy.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/planificacin_estrategica_de_mercadotecnia.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/babexinapazeximomano.pdfIn PDF document text
    • http://copriyghtconfirmed.com/sri_lakshmi_stotram_in_teluguysh3x.pdfIn PDF document text
    • https://dusonibegoxat.weebly.com/uploads/1/3/1/3/131380688/bebilesu.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/vajijenoluk.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/pigolo/chirugali_veechene_ringtone.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/schwinn_bicycle_pump_parts.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_off00014d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D04 5524 bytes
SHA-256: f730caa41db083598fcf935ecaf937be9dc437c86b201b8e1f9c957671cd9b72
font_01_sfnt_off00015fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FEA 10840 bytes
SHA-256: 5f24d64dfc23608db8d5d6f20cd72c5a65203599e1d36f8746bdc227f5ec2005

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