Malicious PDF — malware analysis report

Static analysis result for SHA-256 3233469ea2170ddb…

MALICIOUS

PDF

67.1 KB Created: 2020-11-24 03:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8a4448b5f74ebf274b96587d79186c8 SHA-1: dcb059f2a9ce557e44788b5cb89c66dce5e0a058 SHA-256: 3233469ea2170ddb2a29f88f279391bbcd50ccb9f2f8ca0375dd9d4b0ff396bf
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of the external URI is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=embroidery+stitches+book+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fb550bda46c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_5fba4305a52c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5f9c0e1ef287b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f8c2334deff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_5fae48f30543f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f9fb88c419ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9db20ae27da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408485/normal_5f9317de37953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wonoti/zinedatagufipetiwakinaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/14941719615.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/how_to_know_silent_letters_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336fe3cd-d859-4d17-b988-53035c2e746b/sulijabazizabun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e910ac0c-a7ff-4187-a05e-a62052316bc3/16805021304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc8563b-96e1-415d-8d7f-c04716be9f0e/final_fantasy_xv_timed_quest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53982d93-9ad0-497a-a425-d417adb0d013/tobozux.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/sentence_fragments_exercise_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbdb872-7114-4dcc-9e75-32b73d8f946b/71375292721.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_off0000cb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5A 5416 bytes
SHA-256: 797fdf4a9636f9d75f36a4466be699c9418e876ff94ff4839d0558ab96b60f4a
font_01_sfnt_off0000dda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA1 9800 bytes
SHA-256: df5521b49286afd237970e53eb64bbbcb12dd8529e4a5721649224df88471b46

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