Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9668b98469b4e24…

MALICIOUS

PDF

118.3 KB Created: 2021-01-19 08:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7301fd6bb870bffbe238269d06808024 SHA-1: c089decf7ec17c4c7be373a0ecaa733090b336f3 SHA-256: f9668b98469b4e24889c3e9463797fb89a4ddad7954f8a9a7822d8eb675fb49b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via the linked content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

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://traffset.ru/123?utm_term=fieldpiece+sman3+manual+espa%25C3%25B1ol PDF link annotation
    • https://rarogifiteli.weebly.com/uploads/1/3/4/5/134529860/ratapowuxirufo.pdfIn PDF document text
    • https://site-1176597.mozfiles.com/files/1176597/neighborhood_walmart_near_me_phone_number.pdfIn PDF document text
    • https://tedejewudokas.weebly.com/uploads/1/3/1/0/131070167/vopugu.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/walosote.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/jesowodeluwawubirava.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/WJBSxie/plague_doctor_mask_among_us_pc.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/zopijobosebewu-bekakatepis-siwononewo-senowapemob.pdfIn PDF document text
    • https://cdn.sqhk.co/duputokodoz/ex1sgjo/40432125976.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/eXhjhVJ/spinel_gemstone_meaning.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/gavagosetesot_jenonuzulimesar_pibimuruweluk.pdfIn PDF document text
    • https://kizerovum.weebly.com/uploads/1/3/4/7/134747257/4279992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f8cba3ff2178.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/22642123164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5fcf29a987e9c.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/pobafemawilobemujuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_5fb410308380c.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/3345122.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://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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15569 5788 bytes
SHA-256: dc9dc2f2117403c67f9fef1f099047943f3199884f4692475bd68532d0e2cdda
font_01_sfnt_off00016988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16988 5256 bytes
SHA-256: b15f64f30462bf75d254ac27563daeb535b6f3dcd4d17dfd192915e34707530f
font_02_sfnt_off00017afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AFC 14028 bytes
SHA-256: 5d925d47dd5fb566fa3eca2cb94ceb21ff277ee71552232b562f0717235d6ca2
font_03_sfnt_off0001a690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A690 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_04_sfnt_off0001baf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAF8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176