Malicious PDF — malware analysis report

Static analysis result for SHA-256 06288f9aca486e11…

MALICIOUS

PDF

95.5 KB Created: 2021-01-03 07:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee73a2307e3aea218b7783d63d53dd8d SHA-1: b7a1888dd09339b850e9665ed8ebb105828e2b81 SHA-256: 06288f9aca486e1130cd9e5df857b72f9f1180ab6ce137e75f60b3ddacf76f53
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 it as a 'PDF_SEO_LINK_FARM'. One of the primary external links, 'https://trafffe.ru/123?utm_term=dead+by+daylight+ace+visconti+build', is directly associated with the document's content and likely serves as the malicious payload delivery URL. The presence of multiple benign-looking PDF links suggests an attempt to disguise the malicious intent.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=dead+by+daylight+ace+visconti+build
    • https://zuzunoginulori.weebly.com/uploads/1/3/4/7/134764202/pazutala_gizuvedebag_rifixozonizo_fegake.pdf
    • https://rodefakuwutepez.weebly.com/uploads/1/3/4/3/134341390/67704.pdf
    • https://rozenawaxu.weebly.com/uploads/1/3/4/5/134517597/f5b17cb2f5.pdf
    • https://cdn.sqhk.co/lanumakefu/wJjgMge/mabotixudafilawotijo.pdf
    • https://xudezilo.weebly.com/uploads/1/3/0/7/130739240/ratagukivopu-gumemepaxawela.pdf
    • https://nanerofe.weebly.com/uploads/1/3/4/3/134312873/1821105.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bisute/outfit_color_matching_guide.pdf
    • https://s3.amazonaws.com/buwosevax/fractions_decimals_and_percents_worksheets_grade_6.pdf
    • https://s3.amazonaws.com/redegelesibif/ansys_maxwell_3d.pdf
    • https://s3.amazonaws.com/baritexovopa/volunteer_protection_act_canada.pdf
    • https://s3.amazonaws.com/bofake/grade_12_agricultural_science_mobile_application.pdf
    • https://s3.amazonaws.com/webipejonavuv/minecraft_bedrock_server_guide.pdf
    • https://uploads.strikinglycdn.com/files/b78a9ce8-74e7-4fc3-91c3-3cacad4a7da5/60752609439.pdf
    • https://uploads.strikinglycdn.com/files/ac01af69-df2f-4360-a7c2-b9e04df9c2f4/40335436503.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010588.bin
5e81d7e2a329144fd34def0c2dbabc04e1aa5da0383a726635cc17fc7c190a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10588 13048 bytes
font_01_sfnt_off00013092.bin
39543a5ce7e3298d64c69e3eba72d95066808e900162768d076dbb67c7432cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13092 5408 bytes
font_02_sfnt_off00014303.bin
129743e408598be12812959e06af0fba9058e05b550e1170ae49ba13b20f286f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14303 14796 bytes

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