Malicious PDF — malware analysis report

Static analysis result for SHA-256 676ead0b37b3f2d9…

MALICIOUS

PDF

71.8 KB Created: 2020-11-25 16:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53d03c9d86d9923d97feaf39b5a7f88e SHA-1: 76f395ede3835e5c76c4dcae5c786364d527a898 SHA-256: 676ead0b37b3f2d9c528d9d96fedec5f11eadbfd9c02b57c9cd39d7bfabc43cb
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is part of a link farm, with numerous external links. One prominent URL, 'https://trafficel.ru/123?utm_term=millennium+falcon+light+kit', is directly embedded and likely serves as the primary lure. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan PDF. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign.

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://trafficel.ru/123?utm_term=millennium+falcon+light+kit PDF link annotation
    • https://rukewopesix.weebly.com/uploads/1/3/4/2/134266340/571787552.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/gopimawogirofowugapo.pdfIn PDF document text
    • https://rulozakowix.weebly.com/uploads/1/3/4/7/134730123/d95f8e55c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fa7a981f1a02.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/9052c16e-8286-476b-8f90-ccf356830f66/lojokoledemide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253046e9-6c73-43e5-947c-21bac067f113/wejegetorudag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87b6fea-f43f-4cb3-a179-ac4999408932/35771650569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67fdc8a-4446-4e95-8c80-95121bd1c1e6/15728052345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3691dc7a-6b00-4448-b37c-5fa84ee390ef/28477339897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e178403-0020-4ff2-bb6b-aece382bec41/danufuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07531508-2714-4187-80c5-e1addc4bb077/vinejoragurasuzujasodidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d010e303-ba6e-494a-b2c7-cc422a7f3b30/tijaferomotoganogeminewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd88c4af-05b4-428f-8cf1-8ea1f6245dcf/rabazokekekivelimulovefe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E1 4972 bytes
SHA-256: e9cbcefe0945f5ef5cb7ad8a5660de9b176252c07450a709cd692615f2482d06
font_01_sfnt_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 10516 bytes
SHA-256: eb45def818be9facf4ef1a2398ef80c4e735c4a0910a93916dcf936bd59bc4db
font_02_sfnt_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174
font_03_sfnt_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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