Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbc95606028a89e…

MALICIOUS

PDF

79.0 KB Created: 2021-04-04 14:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3fdab7ebf861a6252a115b5465762283 SHA-1: c3fe394e80a8c58f6780d57fe67af14638a4d699 SHA-256: fcbc95606028a89ea982c1422b0dce4508cb8a8c10f342710433f0b3bfe638e9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://fokemale.ru/123?utm_term=social+media+platforms+and+demographics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475739/normal_601a2c2ab791d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413227/normal_5fdff488802a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489402/normal_5ff6b1850d286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_600d39e394c88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367925/normal_5fce936942d8a.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/6760570.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_5fdaf16769c4a.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/a614adc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472766/normal_5fe60f4139d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_60689c8ce4e72.pdfIn PDF document text
    • https://voledobaseju.weebly.com/uploads/1/3/0/9/130969813/widokekivab-fisix-worazowe-tamerutala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5fdede087ca49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ff23e0c61d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_604ab1da2e1ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc9b6d454c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_6068ae6a2ba66.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/4270873.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/juzewojavomofew/bedezafeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/kevazelowuzusimid.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/root_mean_square_error_interpretation.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/dialysis_unit_guide_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/ratexagewa.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/kitchenaid_superba_gas_convection_oven_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/37943487197.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/fuditifuma.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_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 5672 bytes
SHA-256: ed103d9183533e5ce5dd5789ec26ff571089e0192da1c198b6ec93c8b973d78a
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 10996 bytes
SHA-256: ed099d793adbde8ad9445f0b805acfde2c0e289d69e933222b0982518bf82add

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