Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbd2ddb1d361c92…

MALICIOUS

PDF

94.6 KB Created: 2020-12-17 01:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ecd0c5be427eeb8e5e01d9f4ca7bc2 SHA-1: 6d3b03ace090ce64832cca9fa780555e69ffdea4 SHA-256: dfbd2ddb1d361c92a1204467611c56532e6b0b7bd2824c36d19dff7de30b044d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting an attempt to generate traffic or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to suspicious domains, likely serving as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=rocky+horror+picture+show+monologue
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/4270224.pdf
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/74043a4b.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/madek-pinekite.pdf
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5fc584a6bc2cc.pdf
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fd780a654fda.pdf
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/zogal.pdf
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f9a087823a06.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc4d5be12facd59cec62577/t/5fd18b41ac13f65f660d11ff/1607568194374/lomokamibulete.pdf
    • https://uploads.strikinglycdn.com/files/1898fe59-7f8d-4352-932c-757daedff5da/97309713291.pdf
    • https://static1.squarespace.com/static/5fce40823775b77c105f7e6e/t/5fd67e220f11661d4c301c04/1607892515192/integer_math_worksheets_6th_grade.pdf
    • https://static1.squarespace.com/static/5fc0e44e92c50b1a1e7784dc/t/5fc3feb82dd96f591869e6ad/1606680248816/gepalotenero.pdf
    • https://static1.squarespace.com/static/5fc50443f9866f3fd2ee67a8/t/5fc9006a4750825615dc11d5/1607008368929/kizazumebemabokifomurepe.pdf
    • https://uploads.strikinglycdn.com/files/6a322fe2-53d5-4fc2-b168-fe85730cacfe/mulojafuwulojogikoz.pdf
    • https://uploads.strikinglycdn.com/files/836277fb-0b25-4558-b505-cea0457da2d7/ocado_group_plc_annual_report_2019.pdf
    • https://static1.squarespace.com/static/5fc652a0085bf90c0e221d2d/t/5fc89cc913f8d93bf2093de0/1606982857815/85775102895.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013488.bin
ff4e512f99bf710d8d55df3da6ae3878c31b4cbcf24156a28c7a3ae4947e6688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13488 5400 bytes
font_01_sfnt_off000146e5.bin
9d900286bebef197c86b30f95ccb3d3eec6c7ef3e31202d86dc57934a4774321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146E5 11464 bytes

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