Malicious PDF — malware analysis report

Static analysis result for SHA-256 0311711ef0bdfb11…

MALICIOUS

PDF

88.0 KB Created: 2021-03-08 19:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce2bcc6413adbb3b0014c5f843cd4fe5 SHA-1: b166899ac277cabbd9842dbd8d72fe9a22ec11a3 SHA-256: 0311711ef0bdfb113dad8f0366b92f26c704925664252bb60b33017b5b2fe4e5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a technical lure to encourage clicks on the embedded link.

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://fokemale.ru/aws?utm_term=how+to+test+shift+actuator+with+multimeter PDF link annotation
    • http://mjawebdesign.net/56451294910g65a3.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/gcuWgds/abcmouse_phone_number.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/bomag_bmp851_service_manualnrzh3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_601adf1085702.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/dUhgjb5/the_third_day_cast_episode_1.pdfIn PDF document text
    • http://electriccannoz.club/72984422328irac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_602a98e0eea28.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/bljxhgA/rubabule.pdfIn PDF document text
    • http://znakomstva18x.site/53353407816nb293.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/nehcii5/13668691175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/3927931726.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/assistant_loco_pilot_exam_question_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/76674585052.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/borland_turbo_c_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/sujizolivixara.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/25284223527.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/11984110253.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/57849008419.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/ccna_version_6_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/romeo_and_juliet_1996_full_movie_for_free.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_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 5172 bytes
SHA-256: 829bdd9e9c28b8e625f1034fa3c789f00ea9dd20ac3d4f3f70186a47329aff47
font_01_sfnt_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 12308 bytes
SHA-256: ea7356e032b892b7ad871edd674feb3312dd8aaa791e2c986759b26fd9c88a89

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