Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85cb74f8eeab660…

MALICIOUS

PDF

67.8 KB Created: 2021-03-06 05:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b1a3a1f937a3d9a89cb0c0bd551bc9b3 SHA-1: 2e9d531039def8cb8dcde3d2126cf5ebee59c0de SHA-256: c85cb74f8eeab66060e4f7d8b69575828ed076383f8013946a0c768c2c6800f3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=how+to+read+a+diehard+12+volt+battery+charger PDF link annotation
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/balaxoxakas.pdfIn PDF document text
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/dadidi-dazofepofu-vedoxatugujen.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/luzozutawep.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/5873755.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/530b2c0d8d7.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/how_to_write_essay_about_myself_example.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/loxijog-tarur.pdfIn PDF document text
    • https://vixagudidiw.weebly.com/uploads/1/3/0/7/130775505/2223880.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/17708744585.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/95755771a4cba25.pdfIn PDF document text
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/ritagedorolofawuk.pdfIn PDF document text
    • https://matisosu.weebly.com/uploads/1/3/2/6/132681513/xunoguj-rawetax-patudid-sosaximo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_7debd33fc1944a8295ae74d041f94014.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5b8200-d5b9-4868-9765-0aceffbc6179/95667399845.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_139434937b5445bc853a26241a1df731.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c188aa09-acb5-4cfd-9e97-c4a8d12fb857/armitron_45_7012_alarm.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/51192354455.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/mototijupuwekeg.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_3e4fa4fb3bb9402088828db84d1565ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/981a55f2-1536-445f-9be0-fb76af24c666/rinenir.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_88d72b705a7547a9838a1c8c806cf14f.pdf?index=trueIn PDF document text
    • http://namepafubi.atwebpages.com/omron_bp742n_5_series_review.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_off0000ccff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFF 5560 bytes
SHA-256: 505f7aa576a1177649bdc66bbff861bdb7ea3b3250fc985d35655403f22e552a
font_01_sfnt_off0000e004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 9800 bytes
SHA-256: 263290e231e16cca0e9c4600fe69724519acbd48435738066879a75144b77734

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