Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba56b0a153cf5778…

MALICIOUS

PDF

85.1 KB Created: 2021-01-11 01:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5a5ec771b41206d1ffa0d27f8d6d5885 SHA-1: 1be26ff319970dd6c5ba192f07379a361c572d0f SHA-256: ba56b0a153cf57783f7f3db544315e0e6a1869e21ffe4212f7a69a683dadce83
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it uses urgency and callback lures. An external URI was found pointing to a suspicious domain, likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafficel.ru/123?utm_term=maryland+driver+improvement+program+test+answers PDF link annotation
    • https://cdn.sqhk.co/zutujodara/qihja8H/slot_car_armature_balancer.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxefoxo/4lPgeUe/54316620414.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/nifWibW/77999193845.pdfIn PDF document text
    • https://site-1176552.mozfiles.com/files/1176552/gofopipuvezegizeji.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/jipowumat/piano_music_sheets_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/49413057185.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/lemuvojedubamewaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/state_of_texas_employee_tax_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/royals_diamond_club_menu.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_off00010d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D95 5536 bytes
SHA-256: 859dfeb29026f71313f72d5a70029ea092823ae4b63027594fc30f5a559e2b38
font_01_sfnt_off0001207e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 11580 bytes
SHA-256: 516c2df62f95f9c74934d689df40dccf34be6b422e282c4bc3444acb482789ef

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