Malicious PDF — malware analysis report

Static analysis result for SHA-256 46fd8a26bcd0793d…

MALICIOUS

PDF

82.5 KB Created: 2021-03-12 17:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 31a4ad7d71f902256d12dfeaf565f15d SHA-1: e85332307d6bf401db35a81a229beafdd1de9105 SHA-256: 46fd8a26bcd0793dbaaa3c3ac3e0fa744143288431fd14c30cb90b886bd1764c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=among+the+barons+ar+test+answers, which is likely used to redirect the user to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=among+the+barons+ar+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465136/normal_602daf30568f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_5fecd4bf29294.pdfIn PDF document text
    • http://doucheapp.xyz/xuvizor2x4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fddca7ba67bd.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/fpdnLid/skulduggery_pleasant_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/ihbjgpO/2._0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_5fc9a5243f1aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_604207df19784.pdfIn PDF document text
    • http://lofitner.buzz/75060057439l06ru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_6042e128825bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_5fe1cea656fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_601c6a3a77bf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_038b3b3e5736427bb5718a9e6500ac07.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_55549d8a31b34953a8307b328984d0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/ronavibekakibafipobuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/75202587293.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_89cc746072d341ff8b8b2cb7441abc0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/greenhouse_gases_and_climate_change.pdfIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_de9d0fa0c8cd47fa977cecd30bedf92a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/how_much_does_aviation_maintenance_school_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/5343374021.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_68cf98b604e94f15a60f42ea79c1f3d1.pdf?index=trueIn 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_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 5288 bytes
SHA-256: 4113494d59c88c5079bf90dd5117b2761eebfdd510b2d8e5c4f14d379ef4b2b8
font_01_sfnt_off000115cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CC 11740 bytes
SHA-256: 10699ae31f634aa4d85ec188d6d9250f447df66411f9890ec20ee34cfc43da34

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