Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b35e9b479907c3d…

MALICIOUS

PDF

68.1 KB Created: 2020-12-01 12:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 627e32f621348ec322a77512f642d31d SHA-1: 8ce4e26977714651e98c088f7e360171a531ba25 SHA-256: 3b35e9b479907c3d153b52b99a5ee89ffc7cfa1cbf09da786642bd7863fe60a0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL points to a suspicious domain, likely serving as a lure or a distribution point for further malicious activity. The document body, though heavily obfuscated, contains text related to 'Apa style guide book titles', suggesting a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=apa+style+guide+book+titles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474750/normal_5fba8d068a14e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fc4bc823e350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f991890bd7a3.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/juliziwojatige/79716823305.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/amy_schumer_documentary_pregnancy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc306df2e537a05ef16faf6/t/5fc383a23c02f22b9d7a2a9a/1606648744128/vozuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/prescott_south_elementary_school.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/effective_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sherlock_holmes_baskerville.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8305687f52b6b812c21/t/5fc22f6a1972c46e3ce7c69b/1606561644147/tebarufokuwibanijo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e6f62bbd74065813a7ba/t/5fc534e0a97599144ea213a5/1606759649674/kingdom_of_rhodoks.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/33433661705.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/financial_accounting_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/autonomous_annalee_newitz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf69515147b148042b9c09/1606379858328/eureka_math_grade_8_modules_12_answer_key.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_off0000ce8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8F 5324 bytes
SHA-256: aafa1da8d1b4a9291afc9fa4fc973b7cbe3c4cb71815d873e2c4c5aa09914de2
font_01_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 10092 bytes
SHA-256: ed5ff580abdd4c268b6a23ffcf844ad3134a4b8229b087bd947020e894df9a5a

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