Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dae69c49fde8b8…

MALICIOUS

PDF

67.7 KB Created: 2020-12-17 10:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06d51dbc15fdab58996c2b532f412f57 SHA-1: 12e18348a13c1b27aaa199f65dc01e737246e4d0 SHA-256: a5dae69c49fde8b8b21913b02fb3e5447b8aeba0ff06339357d4d834adc61cd3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF that contains a lure related to payment redirection, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It embeds a URL, 'https://traffset.ru/strik?utm_term=university+of+georgia+tuition+in+state', which is likely malicious and serves as the primary attack vector. ClamAV also detected this file as a 'Pdf.Phishing.Trojan'. The combination of these factors strongly suggests a phishing attack aimed at financial information theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://traffset.ru/strik?utm_term=university+of+georgia+tuition+in+state
    • https://dawupewutusod.weebly.com/uploads/1/3/4/8/134879821/kowavugosit_pabikojobowo_nevega_nexitiwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sulasatevirexo/polixububuroboxawumovez.pdf
    • https://s3.amazonaws.com/tarizirefevifab/chevrolet_vin_number_information.pdf
    • https://static1.squarespace.com/static/5fc1412bcd1e280355d6a3a9/t/5fc360074f983757204ac1a9/1606639624526/rakikodu.pdf
    • https://static1.squarespace.com/static/5fc7b538feeefa0c0b63a799/t/5fd6e549e5ac582896357858/1607918930823/hepa_filter_air_purifier_consumer_reports.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4ca5f488c96258dfdb2d/1606241445909/foxorupovijo.pdf
    • https://s3.amazonaws.com/mudurixo/68810745902.pdf
    • https://uploads.strikinglycdn.com/files/24a73bfb-6042-46ce-91b0-f5621232cb3c/small_speaker_review.pdf
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc21aef3570fb44d14abff8/1606556401191/coleman_dual_fuel_lantern_manual.pdf
    • https://s3.amazonaws.com/varolexexus/free_address_label_templates_avery_8160.pdf
    • https://s3.amazonaws.com/petikamov/watch_the_rise_of_skywalker_online_reddit.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_off0000cc11.bin
dfdce2e252f30291d95d73e52c553ac160648c5b08843c4e22b697f20482ee08
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 5056 bytes
font_01_sfnt_off0000dd68.bin
25bd948a8186440ab7482e26a0c10bc6f91487d99a9f1721ac67cb455f16ae7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 10948 bytes