Malicious PDF — malware analysis report

Static analysis result for SHA-256 55985b0f06bb1b80…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 20:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aa309160b3fe52e5064b46c9ac2cf0b1 SHA-1: 3527770917351b9d6033b5c836a7949c243c5940 SHA-256: 55985b0f06bb1b80b13e53c749d00371b97970a8ea96bcae6d869190af836268
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://baarspo.ru/wix?keyword=is+avatar+anime+good PDF link annotation
    • https://cdn.sqhk.co/jebavimot/hIhc16k/29393354560.pdfIn PDF document text
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/zivumojezugesur-vebodajufimuf-rutowameruva-ketaw.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/32173294117.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/princeton_review_mcat_physics_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/ghibji3/saletira.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/ygNNwgj/23486966280.pdfIn PDF document text
    • https://webemimerur.weebly.com/uploads/1/3/1/3/131380848/2168882.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/hh0unje/shelter_island_san_diego_best_hotels.pdfIn PDF document text
    • https://poturifipejo.weebly.com/uploads/1/3/4/7/134767967/ziximasawurog.pdfIn PDF document text
    • https://nipukidifa.weebly.com/uploads/1/3/0/8/130873732/b10c1a21bf3f3.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/ipad_mini_newest_model_2020.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/wadijuvupisojew-fizezowubenok-murinavaxowural-lomobitamejane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuwutexo.onlinewebshop.net/xefebisupokapujanono.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/nokubaxobigomubejawevikaf.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/guxexitesekelakekewazomej.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/vesugofujipuzodafumoburu.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_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 5108 bytes
SHA-256: 140b1cfe1b7aad64a7a29d2f923a5de26d9c251248368113fece7c812c8ce548
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 9508 bytes
SHA-256: 01da69d79e3cd59780e63d109c040ba4155f25ff15e6057f69d7c608edd190de

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