Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29e445968e53da8…

MALICIOUS

PDF

65.9 KB Created: 2021-02-26 18:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b4f5d9e5922613aff52ffe3a9f4f7fba SHA-1: 02ce95fb8ec4168918a0ba5eaa45ea84ab233b02 SHA-256: a29e445968e53da83959e072d16fd1d8eae7579f51f31cc3aed22db1b01f3af4
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which point to domains commonly associated with phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting the document's primary purpose is to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=skills+worksheet+concept+review+measuring+motion+answer+key PDF link annotation
    • http://rosutob.getenjoyment.net/cessna_172_maintenance_checklist.pdfIn PDF document text
    • https://nakubinigana.weebly.com/uploads/1/3/1/3/131379761/jaroweb-xobomojogatu.pdfIn PDF document text
    • https://xovomono.weebly.com/uploads/1/3/5/3/135345708/zewuzinazaba-titesipip-sobobegili-tuwumakotaru.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/1c296769e8c8.pdfIn PDF document text
    • https://gadujixefanupu.weebly.com/uploads/1/3/1/1/131163635/801a9fc0365253.pdfIn PDF document text
    • https://titapogesasoja.weebly.com/uploads/1/3/1/3/131380181/1beba34c05fa5ba.pdfIn PDF document text
    • https://bujubupe.weebly.com/uploads/1/3/1/4/131437121/dunimebized.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/how_to_change_4_blades_on_a_honda_lawn_mower.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392453/normal_5ff4544760f07.pdfIn PDF document text
    • https://lipofodimeduwep.weebly.com/uploads/1/3/0/8/130813747/6594571.pdfIn PDF document text
    • https://penoruzeni.weebly.com/uploads/1/3/4/1/134132400/vuturasarura.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/vuzotisenixava/16187570272.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/to_brisando_em_voce_gaab.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/55290315842.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/level_one_antiterrorism_training_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/xabuse.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_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 5768 bytes
SHA-256: 2d31653a95d2c002237a037588760fa0d2d6b5dfedaf0fe6c11a673c105ac128
font_01_sfnt_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 9568 bytes
SHA-256: 7b41f62d5a93e606c38819b94032210c206a62fb82817fee8614dbc11b4e30b4

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