Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c0f6ed5c17ffb4…

MALICIOUS

PDF

69.6 KB Created: 2021-01-10 01:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1df43d525389b7ca96d9f31374da6c66 SHA-1: d6ae3b1f762803638f5194b864407a541e4f2f55 SHA-256: 78c0f6ed5c17ffb4d98644644efa19b32bc405b451bb3161440cc8ec1318f820
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting potentially harmful sites.

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://trafffi.ru/aws?utm_term=rendezvous+with+rama+audiobook+free PDF link annotation
    • https://cdn.sqhk.co/girasufu/WXqHuP7/lugituwivivopas.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/mubanudolazenud_lilugosesuje.pdfIn PDF document text
    • https://cdn.sqhk.co/fifotadog/Vhchahh/labanuxufin.pdfIn PDF document text
    • https://sojekaga.weebly.com/uploads/1/3/1/0/131070529/tudujuxafo_tixaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5fbfe83fe9da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f8b26841075c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geradi/dozezuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/10401746431.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/vizio_tv_e241i-a1_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/zogiwamax.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/22634878080.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/kozasabivesopunozoxov.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/tajizemodepolazorebivukel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 5528 bytes
SHA-256: b5bf2f6fe72116ee7fad5798b996c8a6f7de58cf00f730664850447de4db0a66
font_01_sfnt_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 10788 bytes
SHA-256: 02515b3ac2e3d1c455f5021af7454709b3208e70f84379dcd997aaa115fdc8df

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