Malicious PDF — malware analysis report

Static analysis result for SHA-256 185f6363033ca46e…

MALICIOUS

PDF

70.9 KB Created: 2020-12-01 21:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b84a2e1b805bc848f483dc6d7692a8f4 SHA-1: edc4e3d7c13a39a8aa4e996f2da3f94e671e4e09 SHA-256: 185f6363033ca46ec3e07649c8d0434087b30c53b892b93234c581e626e265ce
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, contains fragments that suggest a lure related to 'shop play win jewel'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=shop+play+win+jewel PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08b01972c46e3c66462d/1606289591433/kimapopiworoluzorajuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51abf99e-3353-48c4-9468-dfa2b6877ca5/wogupilaretekedopijosipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375da8fe-e68b-4f78-9e56-1c01c32290f8/fusiloninazuvawu.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/crepe_paper_sheets_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/jingle_bells_sheet_music_clarinet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5336e6d49a06bb88a759/1606374199000/rimix.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/tagotajuvebowasitesidetu.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/sir_william_crookes_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a939e6ea-b123-401b-972a-7510e0feccc2/word_that_starts_with_se.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefd13fdc31513a0e7314/1606217682751/reber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79d44543-1f00-473a-ae48-2827710fa61e/atlanta_falcon_kroy_biermann.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc194132cf09257bd70d589/t/5fc3b49ae18c5c478e6ca758/1606661276132/37880163177.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 4716 bytes
SHA-256: 9a593a0109f144afcb27bf1a1f1318d78d53910c5028dca16029f2d97c57fae4
font_01_sfnt_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 11020 bytes
SHA-256: c060e775b03db87fc03984303cdf119ccf1af62ef562b39b6d4df2121a2e9f95
font_02_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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