Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3c6b86fdefb931…

MALICIOUS

PDF

74.3 KB Created: 2021-01-08 08:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 266a9455acf556b9703c65c396f955a0 SHA-1: ee4006cbf5da46afdcb202400b39ee89900e128c SHA-256: 7b3c6b86fdefb931e248df1416d3843bfb48ea57923f1b44726273fe453fb2eb
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing. The embedded URL 'https://trafffe.ru/aws?utm_term=free+annual+credit+report+mail+in+form' is likely part of the lure or a redirection to a malicious site.

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://trafffe.ru/aws?utm_term=free+annual+credit+report+mail+in+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86fc5c911cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462681/normal_5ff021ff624f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463533/normal_5fccff3531fb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fdea0c104c9c.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/007d5558-ce08-4e32-8d15-4c4eb0bbece9/506354317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad9c31e-7149-44fa-8ffd-cb3ecbcf7cca/happy_wheels_games_free_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda20ad9-c789-442d-aac4-60794dcf7673/16737264347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad6e109-4281-4ad7-a3ad-f07f91dfa428/43854445976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdcc440-58ee-4c63-8a85-8a687f333195/42965007807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d9246d-477e-40ff-82de-ac13a9277071/seinfeld_filming_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22a89fa-accd-48d7-b777-7ba51141bf96/8133081119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc33a49c-7b9e-42a0-aa85-9d5709b40884/18853874054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3960f923-505b-478c-b5b4-db5c3ef2f708/last_resort_phoenix_marie.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_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 5080 bytes
SHA-256: 4b5e8766fb1e889b5d5984cca897130ddc178947dc1518a37ad456d225c70a08
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 10624 bytes
SHA-256: 76f56d1568ff50492c005ef51d975615ad36bbfe2463c3c0c0c19292715bdf7b

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