Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daff47ac797a526…

MALICIOUS

PDF

74.4 KB Created: 2021-03-26 01:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d55dfbb2e381c0c9b23125f47addcb10 SHA-1: 766f726897832b6deaa92145f4af255d6c1e26e8 SHA-256: 9daff47ac797a52612380238528ad1a382d1172c8773559152cff1acffd2e905
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=2000+chevy+blazer+repair+manual
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/ab4ae0db.pdf
    • https://cdn.sqhk.co/vovewotutal/tv6gemf/9676070119.pdf
    • https://cdn.sqhk.co/zadoweferoxe/sjfhbtA/cooking_fever_casino_stopped_giving_gems.pdf
    • http://veletekuti.66ghz.com/agreement_format_in_telugu.pdf
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/f87e644a.pdf
    • http://sipenen.iblogger.org/herramientas_monitoreo_redes_sociales.pdf
    • https://cdn.sqhk.co/zafilivopupu/ahcgggj/jotawavutu.pdf
    • https://cdn.sqhk.co/dofubetu/gcijjiY/marine_corps_scout_sniper_course_cover_and_concealment.pdf
    • http://megolapafa.iblogger.org/76815876184.pdf
    • https://cdn.sqhk.co/vovewotutal/gic3hhI/make_cartoons_with_poppy_toons_apk.pdf
    • https://cdn.sqhk.co/xonoguduzob/pMibKzU/82698022057.pdf
    • http://xunetokawetik.sportsontheweb.net/solve_simple_10_math_problems_quiz_avakin_life.pdf
    • http://jilavixit.medianewsonline.com/gojalajevenabaki.pdf
    • http://pegijegur.mygamesonline.org/lotoresakuxofavututalidub.pdf
    • http://wozuxel.getenjoyment.net/catholic_catechism_free.pdf
    • https://cdn.sqhk.co/mugolino/ib1Oxjd/gimepaporifegepunazumima.pdf
    • https://cdn.sqhk.co/gepibilis/jejgWbh/pixel_zombie_hunter.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tagifevada.rf.gd/artritis_reumatoidea_tratamiento.pdf
    • http://sewemira.atwebpages.com/acquirers_multiple.pdf
    • http://dejupaxifitat.rf.gd/47179112757.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c1.bin
5d3ef8207178745476d4db217837229985916436e3429d349d703b1e98a0543f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 5528 bytes
font_01_sfnt_off0000f771.bin
008878d3b3546e71ea0345daa9e3df136ef7fd718091cc5dc51e31b7c96773b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 10784 bytes

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