Malicious PDF — malware analysis report

Static analysis result for SHA-256 937791632e0c416a…

MALICIOUS

PDF

65.4 KB Created: 2020-11-26 01:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f6db02c2a1aa98f60edde50025fcce1d SHA-1: 86177416a2b2a2717d50ec9edfbaafe37d2c999b SHA-256: 937791632e0c416a731e1d873f6fbe340670fac3001ca9bf0115610578e42c0a
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains a callback phishing lure, suggesting it aims to trick the user into calling a fraudulent number. The embedded URL, while not directly actionable in this PDF, points to a domain associated with malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/strik?utm_term=durham+county+register+of+deeds+holiday+schedule PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417207/normal_5fba7abe3f386.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/2911433.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/tokuvapowifov.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/domutaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b828008f-0c1c-4981-8163-932bf2fd2fac/36079459259.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/pozowabulenapora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080e2587-dcfa-47f4-8eb4-c5006da238fb/bowukasoweboba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79428d0-75f8-4376-83a2-b9a39221cb7f/bidesupevuxuni.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/2147431116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e364d5b1-7904-4ae9-b35e-b7910d71c5f6/46854170379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc38be9-9db8-4f57-8e85-f99bf7201f50/business_communication_today_14th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c60e9b8-304b-4e98-aa00-f6ac87073424/43060245292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e50372-7bb0-4b1d-84f4-5524b4b92d64/62546714647.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC052 5536 bytes
SHA-256: 5d3c230d294ad3cae06f1553ea57f4e851edd76d5b878d5a726c9c2ffce81c6f
font_01_sfnt_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 11112 bytes
SHA-256: c1ea7f0a46f812c6cdb9a275ca7409d4000e7765f4658e14c812183ab9dc92e3

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