Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6b1c062d3ab983…

MALICIOUS

PDF

79.9 KB Created: 2021-04-16 22:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e767778f3f767be9af6868fb2478c4be SHA-1: 18376a202e0891cc73f028cfdd1b53098123106e SHA-256: dd6b1c062d3ab983fd7f111a97bdae0d13211612f1b480d11b0d9d4575ab94f4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious sites, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://dugedepap.ru/strik?utm_term=apollo+twin+solo+duo+or+quad PDF link annotation
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/3736364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_605f6c962b93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5ff7bd6f42c28.pdfIn PDF document text
    • http://kolomata.ru/balochi_song_laila_o_laila6hg1g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369781/normal_5fcddece7a1d5.pdfIn PDF document text
    • http://onlyforyou.space/woduwotijopebamw9nb.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/bless_the_lord_my_soul_taize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_6004144e7dcfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406812/normal_5ff5b2b97c029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fd7f54202e44.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/48219106367.pdfIn PDF document text
    • http://lnstagramverifycentre.com/how_has_bridge_design_changed_over_timel6h7s.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/great_saphenous_vein_anatomy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_601723e80c2d5.pdfIn PDF document text
    • https://rizizisexulap.weebly.com/uploads/1/3/1/4/131407181/9590204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_600e47e4c1216.pdfIn PDF document text
    • https://zanonolupurezo.weebly.com/uploads/1/3/3/9/133997165/sukanobivuvanowin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fd6f9e39691d.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/4fa34e0de860.pdfIn PDF document text
    • https://dakusarifupufa.weebly.com/uploads/1/3/3/9/133997242/jupomodu-wevazolajodeged-lelobetimej-wareka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_60271effefc4f.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_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 5160 bytes
SHA-256: 941b4860e8f97b1f752b01c13336a8633f81ef980e47bf2270c6ae5bfde5e18c
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 11304 bytes
SHA-256: 21a363a24ad15126339c30ffe611748225cf8979405445a78790d12625658503

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