Malicious PDF — malware analysis report

Static analysis result for SHA-256 49123015cb643453…

MALICIOUS

PDF

71.1 KB Created: 2021-06-01 03:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0ccd953d9ff478cef2cf7ce1610e6942 SHA-1: af63b4afc6d97a437600d844da5af38e60b8a169 SHA-256: 49123015cb643453b82cd728affb1eaafe0eecebe2925efa772dd78686214e8a
104 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'pixomot.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains references to 'Bose soundlink colour firmware update', suggesting a lure to trick users into clicking the malicious link.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/pbw?utm_term=bose+soundlink+colour+firmware+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377381/normal_6020c7bd7d9e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384468/normal_5fc78d7dd45ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_602bb4fd41d03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_6053219a7eca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_604f0906b8329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_60216f22cd894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5ff9eaa977a15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490950/normal_5fe104305cad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601db83c51ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_604f7fc2dfb6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375075/normal_5ffeb2ba2199b.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/15991316-0863-485f-8385-f486275f18c4/tunarasijejijamozij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769c5cda-fdc9-4448-9a09-ac4c4a77d878/dufagebajarusenepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c28b18-5946-4274-98e5-6806907c4cdf/suunto_x_lander_user_manual.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/30129911986.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144438024/what_are_the_classification_of_teaching_aids.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/1585281092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c1e993-1a06-4e05-8f4a-b60cf003689b/speed_queen_commercial_washing_machine_parts.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413298/nogemomelemogipo.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_off0000d7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B1 5504 bytes
SHA-256: 8c46187293f0eaf7f885cc3a08f58c882511a40fa309abbb1c0a2866f47d4209
font_01_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 11280 bytes
SHA-256: 7c0477c957c950f41a516d5bec4698cc93a29fbe31fb1a9668501c69e870de35

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