Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc4ce8f846c3878…

MALICIOUS

PDF

84.8 KB Created: 2021-04-08 00:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: daad8fb0b5d612c83018f2f352fd2c02 SHA-1: 92397b5e69ec4487363c872da91bf41958cc2d8b SHA-256: efc4ce8f846c3878cc7f5d2847a8d9e6aa37bedb0605f5cedfd8e610490dc95a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/strik?utm_term=taco+bell+calorie+count PDF link annotation
    • https://cdn.sqhk.co/zasemewiti/C8PhaXK/sububidoxobete.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/jqYvkjg/lerawipo.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ejeUvjh/43103503442.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/fijgiGl/moneygram_trading_symbol.pdfIn PDF document text
    • http://frut-tree.site/kefesomanepegileza7b52x.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/igpijge/essential_university_physics_volume_1_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/jjaKOjb/36771269924.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/gdjcof0/90739975249.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/fndif6v/50898905442.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/hage3Fo/cfo_jobs_utah.pdfIn PDF document text
    • http://all-gopro.com/cloaks_and_shadows_d_d7oe9n.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/luramamelolem/wing_chun_wooden_dummy_building_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f8fcd9-2ed4-4c54-a82a-50815b714eaf/pirates_of_the_caribbean_theme_song_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d72c8db-c373-42ef-95ba-a263698c7da7/loketif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad319c31-6b1a-4a9d-a399-cee852299b1b/top_500_metal_songs_of_all_time_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/43035376684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca0a5db9-2f70-4528-b618-fe84ca241e43/50706543997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0f6c85-6cee-4056-be5d-04f326cccf76/sajavirekagepevutamupew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94743103-3a02-4a08-90b1-4ac0be3312ea/zojirushi_bbcc_x20_manual.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_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 4704 bytes
SHA-256: 8a2dc1041490252c4874e931d39a6f49fcc819bebfc9da99da8c515a5903ff27
font_01_sfnt_off00012155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12155 10720 bytes
SHA-256: d517a889c8cc17a1dd29fb644a37a03d3245a08478f60f952a75d0a2e3630a38

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