Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1026ca7f0857b7…

MALICIOUS

PDF

85.2 KB Created: 2021-04-05 07:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32848612a7d1af0968989ed20441a906 SHA-1: 632262a8079d868c83806e27ca34fa054a4f2a5f SHA-256: af1026ca7f0857b722ee81c5c8b57ecc5860b692425fa5f2c05cff45a016b4c0
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Wu Tang'.

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/strik?utm_term=wu+tang+show+true+story
    • http://lovapezelewog.iblogger.org/sujuwipu.pdf
    • http://jorowelumupikom.iblogger.org/lunefojevibopu.pdf
    • http://bakofutemuxasog.iblogger.org/vivowumawamigonetez.pdf
    • http://mugafopame.iblogger.org/vadamovalisemuwelug.pdf
    • http://tanifulumu.iblogger.org/legidokadujikiwaxubebur.pdf
    • http://xadakid.22web.org/7477451791.pdf
    • http://mujazatarotanid.22web.org/rich_dad_poor_dad_audiobook_free_online.pdf
    • http://nobirejajatit.iblogger.org/treatment_guidelines_for_acute_ischemic_stroke.pdf
    • http://zibanozoxepezu.iblogger.org/how_to_say_thank_you_to_positive_feedback.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/21ca7a20-670a-43b2-b37c-1910c7ab501d/how_to_clean_waterpik_wp-360.pdf
    • https://uploads.strikinglycdn.com/files/9367c575-f7a1-4edb-83e7-ef988cfc117b/bumerumazovemegufezawati.pdf
    • http://wamulax.epizy.com/oxford_english_dictionary_full.pdf
    • https://s3.amazonaws.com/jifesu/self_pollination_and_cross_pollination.pdf
    • https://s3.amazonaws.com/napoledunadigo/91023935524.pdf
    • https://uploads.strikinglycdn.com/files/44c03547-f18a-42ce-b073-e97bfdf799a8/foxosadusuvokirero.pdf
    • https://uploads.strikinglycdn.com/files/87235039-d6ae-45f9-8b7c-140078a3ee84/jexorukojibijexapowoboz.pdf
    • https://uploads.strikinglycdn.com/files/b99973a2-0838-403c-afdc-d1c5c7112668/mepisebapig.pdf
    • http://tupirufoga.rf.gd/how_to_make_a_gas_golf_cart_stay_running.pdf
    • http://nupawibufa.epizy.com/brent_faiyaz_lost_zip_album.pdf
    • https://uploads.strikinglycdn.com/files/9f8adf47-f9a5-4b28-bace-8e08f174b38b/27131040079.pdf
    • https://uploads.strikinglycdn.com/files/f6a1a17f-b2a0-42b2-a0dc-8d7edd881588/honda_eb5000x_parts_manual.pdf
    • https://uploads.strikinglycdn.com/files/e8046011-149f-4c4f-b863-12c3c2d1cbe8/where_can_i_watch_call_me_by_your_name_free_online.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_off000110cb.bin
3b8b063d4a63f5b214719be2632aff5969d54d2e544c4be4e0c94981d5bf287a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 5120 bytes
font_01_sfnt_off00012253.bin
37e7eb2a3d9445a5e8dea55b7f2d7bab28c0fbd94bcef79d1e6b10e25fc9708f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12253 11012 bytes

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