Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dfeefa2efccc72…

MALICIOUS

PDF

75.2 KB Created: 2020-12-17 05:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 160859a240bde99b36eda2b71345002d SHA-1: 79fd745fda8c2b835e4af8f5105953e52605f162 SHA-256: 75dfeefa2efccc72816db60021f6bc38623a7ff6b173419fd02e0f29a46acca0
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'trafffe.ru', which is highly suspicious. The document body, though heavily obfuscated, contains text related to watching a movie online, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=watch+promare+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f89cbfb6f164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fb4e79695e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f93b363934ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f903fc606f5a.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/5966c701-9cd5-4c04-9a0b-6bd4896fdda7/a_dog_s_purpose_book_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc36e14bc819f1cf444966e/1606643221466/wezenabaluteb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ab11d49dd124475cb831/t/5fc7ef9256f0cf066cda4e7c/1606938514995/91092532864.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/2007_bmw_320i_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44ad777-a524-4491-a599-88f6e8429c48/burn_boot_camp_kenosha_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/proust_was_a_neuroscientist_chapter_4_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/xafaxopuzolulexoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5526570f-3ae6-4f35-94a6-7cbde24b0bd6/63046575171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0280852-91a7-4e32-93b0-03e3d5da7b61/mypin_ta4_ssr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59138b1-96c6-497e-a8ff-b40f7fabf16e/problemas_de_suma_para_primer_grado.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/bogoligam.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_off0000e9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 5008 bytes
SHA-256: 67b0ddb5a308ede3988f8f9cd4a17f062db6c2dd9fbafd9405315e25b543dfff
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 10472 bytes
SHA-256: 48cf472303f31e8d1254593270e3bf3e2263acdc7bedf1d5323184a2ef0a38cc

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