Malicious PDF — malware analysis report

Static analysis result for SHA-256 d390a32c93224a0c…

MALICIOUS

PDF

69.1 KB Created: 2020-11-18 19:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7ac5181ab0c83d5446c100c516899e2a SHA-1: ba48a90eb6a79099fdc7427f1141a5ba1eb7d132 SHA-256: d390a32c93224a0c895b6e160e5ac736491d3d74526ea95c307dbe8012b42a3b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, with one pointing to 'https://trafftec.ru/123?utm_term=fox+chapel+area+school+district+address', suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to manipulate search results or direct users to malicious content.

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://trafftec.ru/123?utm_term=fox+chapel+area+school+district+address PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8763faa2e87.pdfIn PDF document text
    • https://wiwotejezewol.weebly.com/uploads/1/3/4/6/134691264/dovoterubaxemogu.pdfIn PDF document text
    • https://dukutisanag.weebly.com/uploads/1/3/4/3/134318107/ca1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f985f0248355.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://s3.amazonaws.com/kofabube/47578997952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208ba5ce-f5fd-40b4-9d4b-c1b1e38e574c/reminder_email_sample_to_professor.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/biodiesel_production_from_vegetable_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/heat_regulating_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/rulosixudeposat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfec63b7-91e3-495e-ba74-45fd4de315da/91043048515.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/anfp_fixture_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd4538c-517e-4985-b430-22027d6fc7da/vosidivivikukatumanuz.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_off0000c1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C1 4868 bytes
SHA-256: eb7eea1a658b10c36827dc5ec622d97de4714829f2cbec1d83c4c24cfe9e37c8
font_01_sfnt_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 11608 bytes
SHA-256: 558f8558557a0d8eb9888afb503efa83a336633c1e4f1809b999275d07b2501f
font_02_sfnt_off0000f97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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