Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af94eb7b2c542e7…

MALICIOUS

PDF

82.2 KB Created: 2021-03-20 05:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6728f1de75922eb1c54680e5de76c5dd SHA-1: 74e1d27b526c4037a3007d88e54b47773e3d04aa SHA-256: 4af94eb7b2c542e7ad5e9436ebc2d6b1b7aabe3dcdc9663418cc1b7c36f343b8
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, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, contains text related to drug classification, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/award?keyword=classification+of+antiulcer+drugs+pdf
    • https://cdn.sqhk.co/mamevugixej/jiopaPO/32697606111.pdf
    • http://jinevul.mygamesonline.org/29248609131.pdf
    • https://cdn.sqhk.co/vefemenivu/gdBheji/wikukevodusixejexitixubu.pdf
    • https://cdn.sqhk.co/totarujined/pRHbZGV/reference_contact_sheet_sample.pdf
    • http://rilomenininun.getenjoyment.net/army_national_guards_mission.pdf
    • https://cdn.sqhk.co/kibukumivu/pTy8vDb/pipexigebupobuxozasolil.pdf
    • http://xapidomin.mywebcommunity.org/bluedio_f2_manual.pdf
    • https://cdn.sqhk.co/nunexijezep/dhfUgjn/proximo_pase_elite_free_fire_diciembre_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavalukato/sunovanateregus.pdf
    • https://s3.amazonaws.com/bepukuba/thinkpad_t420_review.pdf
    • https://s3.amazonaws.com/vuforewebub/invoker_dotabuff_guide.pdf
    • http://wojibikifi.myartsonline.com/how_to_read_music_note_for_guitar.pdf
    • https://uploads.strikinglycdn.com/files/e27a3a6c-d991-4918-a7e0-c3c08358125d/wordly_wise_3000_book_5_lesson_12_answer_key.pdf
    • http://sulorowanutabu.atwebpages.com/bestiario_descargar.pdf
    • https://uploads.strikinglycdn.com/files/e7da0648-317b-48b3-8e15-845f604f6cf6/35626769493.pdf
    • https://uploads.strikinglycdn.com/files/65402cd9-01ce-4f86-b3af-59403e4b5cf2/roradufemumomawuzom.pdf
    • https://uploads.strikinglycdn.com/files/9ac55e32-aa0c-4751-8a66-d21ec1b12e57/tewim.pdf
    • https://s3.amazonaws.com/moduxanakuri/69597358587.pdf
    • https://s3.amazonaws.com/farowug/how_did_the_drought_affect_the_great_depression.pdf
    • https://s3.amazonaws.com/sazixipame/sample_promissory_note.pdf
    • https://uploads.strikinglycdn.com/files/9401752c-9691-4d42-a099-7dd5c05d9872/what_is_a_private_process_server_in_texas.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e586.bin
8b511c58d3234fa9e6ad089c95d1dc2bd0b31f87be7a4d6a8849fccc4da5c7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 2912 bytes
font_01_sfnt_off0000efeb.bin
ec1b4df9c466b53395b4b724660a9cdcce5ee7181a93b801d9fbce66c9664f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 5228 bytes
font_02_sfnt_off000101c3.bin
47813b663d5ba90ad0d1657e80b715b9d881dc02e581cedc56beb27970cd1441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10280 bytes
font_03_sfnt_off00012536.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 16204 bytes

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