Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dd1783a77b7850…

MALICIOUS

PDF

70.1 KB Created: 2020-11-13 05:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6379c007f8e372b44b094a37b7d5fbe6 SHA-1: 3eb0ae6ec3c261bd3df011050e6d197b158e0bd3 SHA-256: 96dd1783a77b7850c3648aff59380da5a05558a225126e6f4bd274226d7ea137
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in callback phishing and tech-support scams. While no scripts were directly extracted, the presence of an embedded URI pointing to a suspicious domain suggests a potential download or redirection attempt.

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://trafffe.ru/aws?utm_term=cctv+installation+course+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f66835f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_5f9d7999db6f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_5fadcb168ecac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5fadabb1ee7f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5fa83b31b050d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5f8d1b73bb3c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_5f9fbb3baf626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5f8e109f4f39e.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/7c673015-cd4c-4536-94fd-1c3a2f5b7881/musd_school_calendar_2018_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e9de62-3a97-44b3-9bdd-104b81e40b63/92228372729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48089978-e413-45df-8d77-9a6997825db6/tamilmv_unblocking_.lc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9857fe7-c752-4c4e-bae4-2fdfa74257fc/barra_de_navidad_things_to_do.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_off0000d327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 5116 bytes
SHA-256: 5972d2ef7a2e8db3f2e8bf966c1cdbf7fcf00a046483883a5161537a844c867f
font_01_sfnt_off0000e4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A4 11092 bytes
SHA-256: 3027ee297b13efab9f809107ee51da0d3b517bb0f347707b594f635aed41898b

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