Malicious PDF — malware analysis report

Static analysis result for SHA-256 3398cc89043f8f70…

MALICIOUS

PDF

85.5 KB Created: 2020-12-17 06:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c5a9f6dd9e5a3a450ef89728fd87404e SHA-1: bed4298a88336646a276c3ca9e26c2d4b2f8d98e SHA-256: 3398cc89043f8f70f4aefb08f93ec34dfa8267d35cde712f2304acd5245655bf
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, appears to be a lure for a relationship guide, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=lost+in+blue+skye+relationship+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f873b742d3bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404121/normal_5fcdc15738000.pdfIn PDF document text
    • 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://s3.amazonaws.com/gezejoputiwinu/18824763644.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2dfeaf37e3b64610e16/1606284000098/46221776205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc192230-c4b8-49e6-bd56-b842d96830e7/kozomilenolanerowa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e68b04a8c57c14870b46/t/5fd6a48dacac596b0cc57a65/1607902349864/goal_setting_sheets_for_students.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c9c0abaecd33183b2183/t/5fcc007ff94b6402b2055f48/1607204996423/deropa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a0a550-22d1-4871-b698-7d6f5d8a85d1/12892575890.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf523e61e25426e12f5277/1606373950438/bironuginawobosatisege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bbab6f-6d0a-4d00-a4fb-ac40c6355a58/pro_beauty_tools_iridescent_curling_iron_reviews.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_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 5352 bytes
SHA-256: 5b602fa23689eb54a6700fc21211298ad7125990ac8adf877a3c59e4955d073a
font_01_sfnt_off0001171d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171D 10496 bytes
SHA-256: 64632e1985312a940e62d233da4aeffa45cda4096294a871334c13b62a0e02de
font_02_sfnt_off00013b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B25 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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