Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c1cd7e9e96d611…

MALICIOUS

PDF

77.6 KB Created: 2021-03-17 09:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1061edc1ab97e93c071a0d9668a372b6 SHA-1: f8efafc762a61dbfb1f6cd89fceb5435b00f8c19 SHA-256: 35c1cd7e9e96d611440fdaf9a3bdb6d21fec84c67e7d4aa4f7ebe40d7932e7e5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism to deliver malicious content. The presence of external URIs and the overall structure strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/wix?keyword=usf+baseball+stadium+seating+chart PDF link annotation
    • http://idealsit.space/85312969022d27m4.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/xisotefedegexev.pdfIn PDF document text
    • https://giwitororozesal.weebly.com/uploads/1/3/4/6/134652081/vidorexerav-lonofewuxisu-kikonavek.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/vibuj.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/34635350254.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/pejuzizotikitet-letejuxi.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/practical_english_usage_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_601709b233fb9.pdfIn PDF document text
    • http://7lessons.space/sigopaie7a3.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/wogijati.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/dd740204f457f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5fe50ddc4fa85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_600be49ddf62e.pdfIn PDF document text
    • http://felagem.getenjoyment.net/boxofubok.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/assistant_educational_psychologist_jobs_london.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/firinuv.pdfIn PDF document text
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/winivitemow-junokep-bifazevotefopa-rodari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6024774147ef8.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/dosalapasenow/69257824370.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/70815165670.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/enchanting_1-_300_vanilla_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/77065229740.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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 5564 bytes
SHA-256: da0cce2b7802a0f00504c39ef7873c287cdd274fcc29195280937d50a1f3c619
font_01_sfnt_off00010009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10009 11356 bytes
SHA-256: 300e9fc5d683f84c6166565e28eb89dec7b22a4a5e0597cafe08d1684bfdcbeb

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