Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a615dfdb19e602…

MALICIOUS

PDF

67.8 KB Created: 2020-12-15 21:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d455cfd8686ab351f29cc2ca59066c8c SHA-1: 68e18562f92c3e97eeb0e7c7ed51beb051ca6675 SHA-256: c5a615dfdb19e602a8be24c6276495a12e3e7e8a330f54b7bb4c9c07bb0210a5
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 link farm. One of the primary external links, https://trafffi.ru/123?utm_term=castles+and+dragons+game, is flagged as suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing.

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://trafffi.ru/123?utm_term=castles+and+dragons+game PDF link annotation
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/mifetuni-jugapetoka.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/9204632.pdfIn PDF document text
    • https://bomosaxume.weebly.com/uploads/1/3/4/8/134892214/9e254239c.pdfIn PDF document text
    • https://teduminerat.weebly.com/uploads/1/3/4/6/134665194/648f29b7.pdfIn PDF document text
    • https://kavixonew.weebly.com/uploads/1/3/4/5/134592395/banob-kipibava-rabinijevub-xowimebozubem.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/gidibesuxi/2689706913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187eeb3a-28cf-428b-bd44-0f44ba1de228/rupekodeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62dab957-fab6-4fbb-b3d1-4bcbaa36c9ee/nonojerijojurigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce3b157-2c20-4a6e-8bf5-fb0a4fef11fd/garulozafeninidaginorave.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/kadhal_kadhai_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/16654272598.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/betuxerewoviwabomemeves.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/maryland_contractor_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1d0397-6dce-4035-b34f-b8d8d77633e0/mibovulumoxexegoxesuvut.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/54054515562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab567ab1-5d7c-4a21-824c-c950454132be/42231895791.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/technical_interview_questions_for_ece_freshers_with_answers.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_off0000cdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 5052 bytes
SHA-256: d8aa8c887328fc18aa92a58007a9b1e3c05e6bd986c73bfc320183e93cbb61c5
font_01_sfnt_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 10572 bytes
SHA-256: 4d789cc5eba444b005a7a22c4f9b5aeaa8404f94757354616768302b8aba6a36

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