Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3a5936dbf729b8…

MALICIOUS

PDF

72.9 KB Created: 2021-02-21 15:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6c4be90e7607b8f9325f3a6bbd551e67 SHA-1: 0f67a49276b2327da1101ba8aa604c56cdd54ecc SHA-256: 9c3a5936dbf729b842e727310aedc58cf79f2625abd4aac15d35757208586256
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://maypoin.ru/wix?keyword=pandora+apk+mod+android PDF link annotation
    • https://takupomowemeb.weebly.com/uploads/1/3/5/3/135314116/4806543.pdfIn PDF document text
    • https://bexulijariva.weebly.com/uploads/1/3/4/8/134885506/4de4378952ded.pdfIn PDF document text
    • https://rajoligegade.weebly.com/uploads/1/3/4/5/134504333/3b98c6a913fa978.pdfIn PDF document text
    • https://tupipano.weebly.com/uploads/1/3/4/5/134598946/rigimenative.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/5860069.pdfIn PDF document text
    • http://nupubidodeje.22web.org/nutunodurinivaxure.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/jhjiahg/vavawemipizaxojofinorub.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jibgcjg/76052385642.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/9927941.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/Jjcrhcv/kupaguwawogafijezoxebi.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/piwanisaj/64255560709.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/43478886039.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 4960 bytes
SHA-256: aeb8bc43602b0392741bd702adcdcbb3122a9d8fa256a762961570279cd853af
font_01_sfnt_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 9988 bytes
SHA-256: bf8580ede794843c6412fd81595dc0abf2df1a0e2d35a918db33cbcf8bd23b56

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