Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33e33a173d8d7d8…

MALICIOUS

PDF

74.9 KB Created: 2021-01-02 05:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47b375d5c2e6b535e2f8e9d4b26e8527 SHA-1: 78016676b59706fa53494bb5fecdf1d496c3ea07 SHA-256: f33e33a173d8d7d83eb0dacd8d7ffcfe43266e44075c73c49f9f6aed5335e551
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains references to 'Google sheets statistical significance' and 'wkhtmltopdf', suggesting a lure to trick users into visiting the malicious URL.

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://traffine.ru/123?utm_term=google+sheets+statistical+significance
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/38b8cf806e280a.pdf
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/kemajig.pdf
    • https://cdn.sqhk.co/zafupusapun/g7khelz/18045906417.pdf
    • https://cdn.sqhk.co/peferitukofa/heV4dxW/muse_dash_marija.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5fc133311e1b1.pdf
    • https://rubuxunixo.weebly.com/uploads/1/3/4/5/134518382/motab.pdf
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/mesedirexorija.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/00616bf1-cb75-4545-b4ad-3993b29251ef/best_brene_brown_book_reddit.pdf
    • https://uploads.strikinglycdn.com/files/56f74788-69fb-44bf-84f5-40b7c6793a74/54418217261.pdf
    • https://uploads.strikinglycdn.com/files/28dc54ab-62f8-4878-b5fe-ea2fcd54130a/89325626660.pdf
    • https://uploads.strikinglycdn.com/files/59bc47e4-affd-4e1d-a88d-c7a258971295/tariff_of_1833_apush.pdf
    • https://uploads.strikinglycdn.com/files/e5985481-324d-4ac5-b6be-7b41e3ebdcb6/lilotividoketojaxutu.pdf
    • https://uploads.strikinglycdn.com/files/22233673-f83e-4d23-8ac8-49d26150ef42/briggs_and_stratton_l-head_engine_re.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e9.bin
5f4278ee3b590b59568eac1b7d0ed4704f44b37b700863d4ad27e8877fd0426d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 5076 bytes
font_01_sfnt_off0000fa37.bin
b6c08ddabfab8adbf243298b478bebd24ab73b39082261ca06f87883831aac1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 10708 bytes

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