Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5d6bbacfde4a51…

MALICIOUS

PDF

68.3 KB Created: 2020-11-17 22:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 81e288f73d4b5850d2df6072a58bf50e SHA-1: 384cb21a44f925703b58be3da0c8810582347203 SHA-256: 9e5d6bbacfde4a512980ce3975e35e4e0b655ee171f4790ce49d4c3b87027310
116 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 is a callback phishing lure. The embedded URL points to a domain associated with phishing activity. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristic firings suggest an attempt to trick the user into a fraudulent interaction, likely involving a phone call to a malicious actor.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=st+lucie+county+clerk+of+courts+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5f96358ce2d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_5f9fb568afa8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fa7135fc8084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5fa6fb6505284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f899de09199e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8732aada519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5fac514472f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5fad2822d1d74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7c3f8a15-6a16-48fe-98ef-c0472d735534/principles_of_marketing_17th_edition_by_kotler_and_armstrong.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/cdc_flu_vis_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/ap_physics_notes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EA 5336 bytes
SHA-256: a92ba42c7099c1f805834deca8cc01981da92ccd9d1b09679888b43e94908c15
font_01_sfnt_off0000d3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 10072 bytes
SHA-256: 598e93b1651a5acdb2c151345f7080ab7fe1dc2096988b687441adf5f9a71bdf
font_02_sfnt_off0000f64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.