Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e5d725bd365c79…

MALICIOUS

PDF

87.8 KB Created: 2021-01-14 05:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 69d9d91b9bc85e9977c304b7867fa43b SHA-1: 95dfc6f05f570b1ff3297cfbeaa561f62bcd9344 SHA-256: 65e5d725bd365c797cfe40502c2d9b3dbbef596b5d79e0b36046e8866e980182
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it is a callback phishing lure, prompting the user to call a phone number. The embedded URL, while not directly actionable in this context, suggests a connection to a malicious domain.

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://traffset.ru/aws?utm_term=assassination+rogue+pve+guide+3.+3+5 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366018/normal_5ffbcb986e519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f9c2b1c3cf33.pdfIn PDF document text
    • https://site-1177404.mozfiles.com/files/1177404/best_buy_customer_service_specialist_phone_number.pdfIn PDF document text
    • https://site-1178505.mozfiles.com/files/1178505/farmers_supermarket_meat.pdfIn PDF document text
    • https://site-1168109.mozfiles.com/files/1168109/46995612962.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/82347284005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5ff55f0baaf31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fe729ff1de52.pdfIn PDF document text
    • https://site-1168108.mozfiles.com/files/1168108/33375505054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5fd635ae4b960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f9ec49a1c016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f8f78111f363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://armory.warmane.com/character/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_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 5464 bytes
SHA-256: 743c570d5e90f4d82a8e67530b23b7b4759fd4a4a3ce4e88f46432f006e8b10d
font_01_sfnt_off000128e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E6 11804 bytes
SHA-256: 0e25a9dc7450146d195b7b282485194d5ec58fbf3724de608f0e1ad59f5c2bf1

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