Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1067da8e9038b45…

MALICIOUS

PDF

95.9 KB Created: 2020-11-16 15:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 312feb8eaf8687baf923885ea8debf95 SHA-1: 16295928d255d9957e5b8e1f49bab7f349c46312 SHA-256: e1067da8e9038b45f9d9c9f2e63c1f420c3c4648c6a121d5f72d98467081cd0d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=emotional+whatsapp+status+video+song+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f882e0a9e8ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5f8c80f2d811d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5f9000775ad9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5f9b5afb06dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f8ccfe4d73ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f94c30adc83e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed79beda-3cd4-45da-be07-07e11115a21f/80858280463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6054a3-033a-4757-a715-d3f1a65d1430/41125142290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de58d5ba-6a8d-489e-8bee-1e5e8b9aaa2f/wifevajunurubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70930bc6-18de-4c40-85b9-f8b6a23e7858/bonafide_certificate_format_for_school_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c101a9d2-c510-4225-996b-3d4dd0b5ce9a/ejercicios_de_integrales_definidas_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0ea38d-e289-40ba-ade5-1d2fb3949deb/download_milk_and_honey_by_rupi_kaur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/241a9905-d915-4166-a876-416262ef8521/vipekokegobizejizososota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7559ab6c-67ac-445a-97d1-bcf037809dd9/54894367568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b28385-b716-40af-a5a3-ed36ac8cb68a/pigotomone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ab288c-6105-4453-b5ed-a0533fafe421/kepekuvijojopome.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014603.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14603 25124 bytes
SHA-256: 8d132ea98b4163aa59eff3629952bd95acb4cbcbb872f9fd15ca73c29a5fdbf1
font_00_sfnt_off00011048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11048 5564 bytes
SHA-256: 63d03d66d258e1e97d7f3cfa0cf3ec03db78e80cd770d43705b01c31d25c7b04
font_01_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 10376 bytes
SHA-256: 8259fa2b0ddb08b8abcccffe3861252edd2ba41db0f1b9f6eca48d5d04b9c129

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