Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f6c08934b5ef9e…

MALICIOUS

PDF

80.4 KB Created: 2020-11-25 08:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 091989cd061041e127d6064ebec65ad2 SHA-1: edeb3595e19b635b500122b948ed9b023b858d9b SHA-256: 66f6c08934b5ef9e5438248dc0633d6550f01c41cacd8bb00e91961b765798ff
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 link farm. One of the primary URLs, 'https://traffset.ru/aws?utm_term=timeline+chart+google+sheets', is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=timeline+chart+google+sheets PDF link annotation
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/sevabenabuno-vugexajazubi-xofusasuvonulim-barogugasewokat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fae2c621ba02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d7cdce90-2576-49de-a4f2-e9befd629205/36402413310.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/43600999258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f57b1cc-1a41-45c7-9b92-28e1406b0586/kritters_for_christ.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/jedi_fallen_order_tomb_of_eilram_all_chests.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/netizens_in_cyberspace_active_citizenship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fc35c8-45d0-4614-b733-ca5e295a08fa/the_pastry_chefs_little_black_book.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/approaches_to_educational_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/blood_groups_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/aristotelian_vs_galilean_views_of_motion_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 4952 bytes
SHA-256: 33fe937f1a1b7d8750cfdeca710ae73baceb731be7304c09975db25b4a5b5585
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 10632 bytes
SHA-256: 91d6cbd6c97dd71613c789fa6301153dde248230f8312dcb8c700566d4a4712a
font_02_sfnt_off000126db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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