Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfde050d4c8961f4…

MALICIOUS

PDF

49.4 KB Created: 2020-10-05 11:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 7878fa59ea90cedcabdffad7dd863c4a SHA-1: ff3961b496ffc21b9d1a52432b984142d8418cc4 SHA-256: cfde050d4c8961f48ba7c2184925496fcd92f4088b55bb9cec74030d4575163a
142 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that promises a 'steam id changer free', a common lure for users seeking game-related tools. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link to known malicious infrastructure reinforces this assessment. The document also includes a 'password-protected archive' lure, suggesting it may be used to conceal a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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://cctraff.ru/strik?keyword=raiz0+steam+id+changer+free In PDF document text
    • https://site-1040239.mozfiles.com/files/1040239/pasunakemesibet.pdfIn PDF document text
    • https://site-1041412.mozfiles.com/files/1041412/58334102237.pdfIn PDF document text
    • https://site-1042286.mozfiles.com/files/1042286/mobexoloreximar.pdfIn PDF document text
    • http://files.aureliotobias.com/uploads/1/3/0/8/130874614/6299784.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://uploads.strikinglycdn.com/files/0f0e1789-aedc-457f-8527-929dc536c598/32419868692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553bec11-5739-4199-a28e-ad8e7665d1ab/vazigemoxegibexoperalidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8021954e-d00f-4df4-aa20-ba7109c11c28/dexunuvedisibomibevep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/27613215668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7550/9155/files/world_war_2_webquest_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/husky_impact_wrench_h4470.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5054 3728 bytes
SHA-256: d3d3995e35cc42aa524f9bd844d1c245250bd62e6377a9bb78e653b13a2c1a04
font_01_sfnt_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 5280 bytes
SHA-256: 95beacc03e0f1f71f5200d355bfa7abdab6a4188da86e681eb0d7f2e092afa00
font_02_sfnt_off00006f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4F 10984 bytes
SHA-256: f052504318e6432b338c5f60836a7e271081e328e2e0b4eeb7fcf0a429377130
font_03_sfnt_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_04_sfnt_off0000aa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA48 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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