Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1694b2832052ca…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 06:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e5bee595b75ea8d1abaadb2a20589c SHA-1: 97f73794829e0b98914a5e436126ea0402b2e992 SHA-256: 8d1694b2832052ca77cf22cf7998a5f18f81189bba96fd6dc4b5b4c551c12528
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Pizza Hut receipt store number delivery'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=pizza+hut+receipt+store+number+delivery
    • https://cdn.sqhk.co/lebudawojafi/4hedig7/jeweluwaxed.pdf
    • http://dle-tpl.site/laboratory_experiments_in_microbiology_10th_edition9u02v.pdf
    • https://cdn-cms.f-static.net/uploads/4465270/normal_60347795d22bf.pdf
    • https://cdn.sqhk.co/tororukiwuri/ixigCuR/javizuxerumuwotejatusa.pdf
    • http://physcoo.com/hacker_mask_walmart_canadaukqz7.pdf
    • https://cdn.sqhk.co/sufajezugi/fhgOqp4/how_to_remove_guide_lines_in_photoshop.pdf
    • http://blancer.xyz/38699818168bqfcx.pdf
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fd0eadc084f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ef9014f-27ce-4fdf-9806-928896e25580/dugusajutedubituveji.pdf
    • https://s3.amazonaws.com/jixerubowi/2576888866.pdf
    • https://uploads.strikinglycdn.com/files/cc6f80ee-1a29-4b5c-b49f-effca2611f16/hp_agilent_34401a_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/447450fd-57a5-44e9-9005-cc523574e162/is_swgoh_pay_to_win.pdf
    • https://s3.amazonaws.com/vokeri/12457886969.pdf
    • https://s3.amazonaws.com/jaxesabi/87230583809.pdf
    • https://s3.amazonaws.com/bisiku/celebrational_hymnal_for_everyone.pdf
    • https://uploads.strikinglycdn.com/files/2d6bffb4-e6bd-43bc-bdfb-5383081fc8f4/nujekakopatakamikepe.pdf
    • https://s3.amazonaws.com/woxotopapozokev/benefits_of_preparing_balance_sheet.pdf
    • https://uploads.strikinglycdn.com/files/6994b217-03c8-4945-9360-db5ef1a8b5af/62518542521.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_off0000f5d2.bin
1d76f0486cf8dc942ea4fd636dba7151930631395478587f04e20280ac31da16
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 5664 bytes
font_01_sfnt_off000108fb.bin
e6ede2a5eb493c4271110c87544a1739913c204d621c8b67275a079c2ec810ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 10996 bytes