Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d19521e0b7887b…

MALICIOUS

PDF

93.1 KB Created: 2021-03-16 01:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cda19da4ae98bfd6f5ea7f5e3d118c8 SHA-1: 91a55454af0df40b6f0da9a23d9b39556911433f SHA-256: d6d19521e0b7887b67d4dd509316791ff956bd1ac8ab694af6e15d37a1ac1aae
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The document body, though heavily obfuscated, contains text related to a game and the suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely 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://golowaki.ru/wix?keyword=surgeon+simulator+unblocked+at+school+no+download
    • https://cdn-cms.f-static.net/uploads/4481418/normal_6021855f2b717.pdf
    • http://xovitexi.iblogger.org/inspire_high_school_calendar.pdf
    • https://static.s123-cdn-static.com/uploads/4386605/normal_60046bed5a371.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_600b6495c8433.pdf
    • https://static.s123-cdn-static.com/uploads/4490524/normal_5ff79cc1eec9f.pdf
    • http://nijaxubazaziw.mypressonline.com/what_is_5d_code_on_whirlpool_washer.pdf
    • https://cdn.sqhk.co/zisubiziwu/e54fMic/vegojimopul.pdf
    • https://cdn-cms.f-static.net/uploads/4406213/normal_6026ae70bc980.pdf
    • https://cdn.sqhk.co/xawefigi/iejggcl/zizuwovovugeku.pdf
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffc8f9a65169.pdf
    • https://cdn-cms.f-static.net/uploads/4470209/normal_60489f61803cb.pdf
    • http://vigikigopaloze.medianewsonline.com/vizio_sound_bar_ge_universal_remote_code.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pikubub.onlinewebshop.net/focusrite_saffire_pro_40_installer_mac.pdf
    • http://fusipabi.epizy.com/lufin.pdf
    • https://uploads.strikinglycdn.com/files/0db85f24-087f-4f1f-9ef9-878ef00fec65/livaweg.pdf
    • https://uploads.strikinglycdn.com/files/db34dcb4-ca3f-43d6-988f-c3e02a57b17e/mechanical_engineering_basic_concepts_book.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_off00012ad1.bin
da7503b133791382289c46ede39873ee3389fcd0cb7364648e9fef0aea8d7c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD1 5752 bytes
font_01_sfnt_off00013e4c.bin
32a6c6b6ed86ebd9042256cf0663a678be949b3f48f930c55075d0b4ab2771cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4C 11940 bytes

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