Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8839c8eed03691…

MALICIOUS

PDF

74.0 KB Created: 2021-02-03 12:33:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 23d31b23fe22336889e147a26888a6d9 SHA-1: c05c3c014dca03ba2bbf9c2d2688f7f1f35a4221 SHA-256: 9a8839c8eed0369136f6c6f8a1722498ec2403f86d46b06dbfd73204e212efb5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/aws?utm_term=systemic+bacteriology+mcq+pdf PDF link annotation
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/51f60e.pdfIn PDF document text
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/9212330.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/dqvgghg/vifup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fefc0c7ef4a1.pdfIn PDF document text
    • https://bobusenig.weebly.com/uploads/1/3/4/8/134866704/rezemujevop_vofibilefiwu_vibalovonuseno.pdfIn PDF document text
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/rezosikekipufo_tasaterakix_rovoligeluler_rirapafebidatuj.pdfIn PDF document text
    • http://vasamekekegu.iblogger.org/diablo_3_leveling_gems_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/rpjfPii/splendor_translation_in_urdu.pdfIn PDF document text
    • https://pupalajapifev.weebly.com/uploads/1/3/1/4/131454396/miluvijilufugebakat.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/727400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_6004948c61dcd.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/5835527.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/PwhhjJN/bopojof.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/34815042621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_5fdc5667ee309.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/bijjgP9/22548048762.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/xedoxike_xalafaja_xamove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nogomazarem.epizy.com/bulking_diet_plan_for_skinny_guys.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_off0000dfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD9 5944 bytes
SHA-256: 3698c91d8b33722017b534375249e8405bd0117d4785e99253caed8f3481bebc
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 11520 bytes
SHA-256: 4aa4282d6d97b66b8e413590fd343fee6758c91437b0852eabeb55fe991b26e8

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