Malicious PDF — malware analysis report

Static analysis result for SHA-256 da64dae06bbca56b…

MALICIOUS

PDF

74.7 KB Created: 2021-06-05 16:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2e6ab7546bced68ace62847e62181ef5 SHA-1: de95c31b812f8303d3993681b30423e394bbc392 SHA-256: da64dae06bbca56bcdb35762ed69ee73ac0f09cfd079ebd55554e6bac1e5859b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, contains text related to downloading a Spanish PDF, likely a lure for phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://medvor.ru/pbw?utm_term=mi+lucha+pdf+completo+espa%25C3%25B1ol+descargar+gratis PDF link annotation
    • https://tozubovudifudi.weebly.com/uploads/1/3/5/9/135973827/sekew_wevikezo_winaled_sijewoxixazireb.pdfIn PDF document text
    • https://buvewetaki.weebly.com/uploads/1/3/0/7/130775635/8244441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367277/normal_5ff2d6129b756.pdfIn PDF document text
    • https://mekujukoner.weebly.com/uploads/1/3/4/7/134715553/rigos.pdfIn PDF document text
    • https://kupefuvewugixo.weebly.com/uploads/1/3/4/8/134849821/temexal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_6063690e22d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_602ebcbd680e2.pdfIn PDF document text
    • https://gixebufenof.weebly.com/uploads/1/3/6/0/136082423/debux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_605b8a77c6029.pdfIn PDF document text
    • https://dajukufatob.weebly.com/uploads/1/3/4/3/134345308/4287852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_60587a7fe8660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_60031d26a466e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fdbd2e040f5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456387/normal_5ff674b3dbd96.pdfIn PDF document text
    • https://wibafodutaselo.weebly.com/uploads/1/3/1/3/131380847/kuzizijili-pobalidiso-wajafopipasod-mosugurok.pdfIn PDF document text
    • https://jexadafiveti.weebly.com/uploads/1/3/4/7/134765621/tugig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fe6df00e4976.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/rudelobuw.pdfIn PDF document text
    • https://sajowomifekorur.weebly.com/uploads/1/3/4/3/134314212/461bd2ea7eadbba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_60380e09c626b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_60055209dfeaa.pdfIn PDF document text
    • https://mudepazenanaj.weebly.com/uploads/1/3/4/7/134765609/1f902c9bf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_60b8563540afc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488569/normal_5fcaab846dd0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 5788 bytes
SHA-256: 07c0d825052f31c81bdd240c0749c61d282e2d406406560cb89d1df00bd25b8c
font_01_sfnt_off0000f371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF371 12044 bytes
SHA-256: 8f980b84f9b73da053ab42db743c4d23ab041d8e40bd836f672c168b7e1903e0