Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29f3415c05b0529…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 01:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fbcb8b56bdbd7e8f2fec51ae35266c4c SHA-1: 48a401a43ed023ddcfcb65a98deccbcdd499f7be SHA-256: d29f3415c05b0529167979330c83f3aba8eea9826defca12b415d830052fe6f8
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=determinacion+de+alcohol+etilico+en+sangre+pdf PDF link annotation
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/dukutobuzona.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/341586.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/38694690782gnesj.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/bewivinagu.pdfIn PDF document text
    • https://cdn.sqhk.co/tawumemikuva/chgieJd/87760268829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477138/normal_603e246811a8c.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/ftf7ggs/body_parts_activity_sheet_for_preschool.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_6042f4208d843.pdfIn PDF document text
    • http://getallcreditscores.info/bukedde_tv_app0i1ie.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/09603.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/6056662.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/9181667.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/j1ihCFj/nozitiwawexub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_600bc39e5379a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_ebc875c5bb27412ba3bff930c54ebcaf.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_214524ef6ee845549599f40fb2b42f97.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_e641b8c377b647738ef72da6d2de0092.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 5568 bytes
SHA-256: 657238e37b905445ca1e75d127517cdcf2756bca0f3c9ef3c235be81c85d774a
font_01_sfnt_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 11608 bytes
SHA-256: 206edb5ef9c5512bdb02f47a12850651d28a16db7b89c5c2cfd2e8f2e6d7c26e
font_02_sfnt_off00011b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B53 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

Open this report in the interactive analyzer, or submit your own file for analysis.