Malicious PDF — malware analysis report

Static analysis result for SHA-256 d451d1edd3d2312e…

MALICIOUS

PDF

76.7 KB Created: 2021-02-14 17:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 45ae9bd661d17154c7c34b4172803bf5 SHA-1: 8af07b7698d5f859fa55bf751d6535766a9e977f SHA-256: d451d1edd3d2312ea8841c946eb58dfee8bcbbee31984633b1277c4edd231157
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through deceptive links, likely as part of a phishing campaign.

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://jottigo.ru/123?utm_term=myra+breckinridge+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455672/normal_5fdeeda487c56.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/f63Xjhh/silavijaledefirabaxug.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cdXbGZ1/78872589773.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/rurusitel2rpnp.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/Mhehdhi/poultry_shoot_blast_free_space_shooter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476135/normal_6005139381373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_6005b62315736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6020f99092392.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/jgghhuQ/sajoripaxogazugikisanutot.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/igVcyij/tabog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_6007aea551c0a.pdfIn PDF document text
    • http://abzac.me/418886095257a11d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_5fd84294de330.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5ff4b1344ff14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_60143dbb21d63.pdfIn PDF document text
    • http://blog-uniswap.org/vivukeruvkrxg.pdfIn PDF document text
    • http://zespodsvetkoy.site/mujudepefitulinulesakigoz30bs.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
    • https://s3.amazonaws.com/naxozelozude/durgai_amman_photos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/holiday_gift_guide_submissions_2019.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_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 5256 bytes
SHA-256: fd7764a8c583fa7056daccedf9973f286ff966e008697e0272e2438a7a89a426
font_01_sfnt_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 11428 bytes
SHA-256: 0873abee0607adad6a4fc1fa8e20f32dd687507de5d2ee74db983cad872d896f
font_02_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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