Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5681f2195208d9…

MALICIOUS

PDF

101.0 KB Created: 2021-03-24 02:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07d4b178463de2ff4010977b5f454a4 SHA-1: a5c37fcc2366a5a8eb59c9e9e8e0263f122bbb71 SHA-256: 0a5681f2195208d9591fcf3fb0ab9b2e1f00896e339cd7c412f376a361a18d15
144 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam lure. The document body, though heavily obfuscated, contains keywords related to tax information and deadlines, suggesting a phishing pretext. The presence of multiple external URIs, including one with a search query related to tax information, indicates the likely intent to redirect the user to a malicious site for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/wix?keyword=how+to+report+grantor+tax+information+letter
    • https://cdn.sqhk.co/nanagajog/4Nhf3qz/outlook_2007_ing_old_emails.pdf
    • https://cdn.sqhk.co/bikegola/g5jajdn/73663202959.pdf
    • https://cdn-cms.f-static.net/uploads/4471688/normal_600fe362164a9.pdf
    • http://zoxulojiliboro.22web.org/35186656227.pdf
    • https://static.s123-cdn-static.com/uploads/4495271/normal_6004bf85b91f7.pdf
    • https://cdn.sqhk.co/puwidebudojo/jfhhCyI/56099729960.pdf
    • https://cdn.sqhk.co/gujowaxexag/ibjcigc/vefodozalojebi.pdf
    • https://cdn.sqhk.co/nalogigoke/hgifMrb/rock_music_online_radio_station.pdf
    • http://wekifojedopike.22web.org/aislantes_conductores_semiconductores_y_superconductores.pdf
    • https://cdn-cms.f-static.net/uploads/4428062/normal_604b02f637f9d.pdf
    • https://cdn.sqhk.co/xivomojuf/QkWhigf/bingo_party_decor.pdf
    • https://cdn-cms.f-static.net/uploads/4425009/normal_6021e7ef47482.pdf
    • https://cdn-cms.f-static.net/uploads/4496380/normal_5fd7d5105b28a.pdf
    • https://cdn.sqhk.co/wawabosamugo/tichahe/48588604794.pdf
    • https://cdn.sqhk.co/raxoxawupej/jahfJpZ/metutugunenowediru.pdf
    • http://sovadarasuzepa.iblogger.org/wenusalidotipoxatuwebi.pdf
    • https://cdn.sqhk.co/lukulobu/jdCvjef/stay_out_stay_alive_cast_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4416791/normal_60290538dd1c6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://goromanoza.rf.gd/9604408939.pdf
    • https://s3.amazonaws.com/xezujuxoz/jofexixerazilafomipezed.pdf
    • https://s3.amazonaws.com/sewamos/19878665737.pdf
    • https://s3.amazonaws.com/vatakefojunib/free_end_credits_template_sony_vegas.pdf
    • http://lojosuxotugades.epizy.com/kajurox.pdf
    • https://s3.amazonaws.com/mejobu/ct_gun_permit_renewal_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c51.bin
a76f67e7b388da0023a9bb69a7bf9f338c3e01cf1628f395378453773184b8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C51 4952 bytes
font_01_sfnt_off00014d20.bin
87ce1d1580f20e130404934efae19f6b277d13ede6c0b39905a468440e332427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D20 12768 bytes
font_02_sfnt_off000177fb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177FB 4324 bytes

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