Malicious PDF — malware analysis report

Static analysis result for SHA-256 397f9f35c6314acc…

MALICIOUS

PDF

73.0 KB Created: 2021-03-27 19:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b349c501509d5790d8b5160a2b1cb4ad SHA-1: 76f2fd7f68c42edc7b2e4e0cb879f568379bb2ad SHA-256: 397f9f35c6314acc43ce2902e353b7d068f34b483f8fbe92ff449989acf3059f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. An external URI pointing to 'vilenefex.ru' was extracted, suggesting a phishing attempt. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=lightbot+answers+2-3
    • https://static.s123-cdn-static.com/uploads/4408707/normal_5ff08b90f3109.pdf
    • https://static.s123-cdn-static.com/uploads/4379054/normal_60034c333cb9a.pdf
    • http://wajobok.iblogger.org/pebine.pdf
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60251dae58b70.pdf
    • http://summ-ita.space/disney_fantasia_2000_questions_answerszyu2g.pdf
    • http://dommasters.site/57899765588esjet.pdf
    • https://cdn-cms.f-static.net/uploads/4481418/normal_5fdb243628a7a.pdf
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5fcbd8ff8588e.pdf
    • http://detonic-shop.website/astronomy_picture_of_the_day_android_appvqs5q.pdf
    • https://cdn-cms.f-static.net/uploads/4414869/normal_60366c49ba715.pdf
    • http://logvoz.ru/eckhart_tolle_power_of_now_summary1f1u4.pdf
    • https://cdn-cms.f-static.net/uploads/4417980/normal_5fe83e1e9699e.pdf
    • https://cdn-cms.f-static.net/uploads/4385421/normal_60332c442e61f.pdf
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5fff5210aad47.pdf
    • http://cparta.moscow/guzop41c30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kunibenurupamiv.rf.gd/67660939312.pdf
    • https://uploads.strikinglycdn.com/files/01a1f205-2fc7-48ba-8e4b-44c6d51d3ff6/what_does_the_fall_of_the_house_of_usher_symbolize.pdf
    • https://uploads.strikinglycdn.com/files/abb58130-2a96-4854-853e-fc7a6fb87ddf/calendario_sep_2019_y_2020_cdmx.pdf
    • http://jesasudazewur.epizy.com/el_decameron_de_giovanni_boccaccio.pdf
    • https://uploads.strikinglycdn.com/files/a07205e8-4c1e-4faa-9825-5554f49e94e2/how_many_carbs_does_panda_express_mushroom_chicken_have.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_off0000de50.bin
02b0ffae0ed7eb38e2c72672af4a02420473dc99e7015a23bef5541d4a47a65a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE50 5416 bytes
font_01_sfnt_off0000f0d9.bin
4cd73f5b8014d4514bf196149536604b0cc6b33efa0b20857dcff94ac44d5999
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 12172 bytes