Malicious PDF — malware analysis report

Static analysis result for SHA-256 e191bc11c44be0b6…

MALICIOUS

PDF

84.4 KB Created: 2021-03-24 22:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2094de067f07d7209cb58dc39b961488 SHA-1: d5438f08c0ebe57e8b9c3d9a40aa8e3721fbc28c SHA-256: e191bc11c44be0b673d1aa759ebae88349ba220374c67debd6af2018c6da786e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The PDF structure itself also shows signs of manipulation, with duplicate object bodies, indicating a potentially obfuscated or malformed document.

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://jumiwimov.ru/strik?utm_term=jesus+today+leather
    • https://cdn-cms.f-static.net/uploads/4366359/normal_604ccb822396c.pdf
    • https://cdn-cms.f-static.net/uploads/4495409/normal_5fe6cafd71ee1.pdf
    • https://cdn-cms.f-static.net/uploads/4386593/normal_60432e548497f.pdf
    • https://cdn.sqhk.co/ropikenetu/Fijpjh8/tosefatidesurumebofisi.pdf
    • https://static.s123-cdn-static.com/uploads/4407782/normal_600733307a1c3.pdf
    • https://cdn.sqhk.co/xagaxubibiz/dVYNibX/hempel_paint_data_sheet.pdf
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5ff52a1d2cc8f.pdf
    • https://cdn-cms.f-static.net/uploads/4490539/normal_6049cbfa4da5a.pdf
    • https://cdn.sqhk.co/ramawuvade/lPixxhb/nusegafuporoximad.pdf
    • https://cdn.sqhk.co/semiwewedazi/jalbEuN/emergency_room_technician.pdf
    • https://cdn-cms.f-static.net/uploads/4460055/normal_600a6511620f9.pdf
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60384fa77e2d3.pdf
    • https://cdn.sqhk.co/zarepowake/ifgiaie/twisted_root_dallas.pdf
    • https://cdn.sqhk.co/zodozane/h8gcSpx/falling_in_reverse_lyrics.pdf
    • https://cdn.sqhk.co/juzilolawu/e3Oihe8/66838040912.pdf
    • https://cdn.sqhk.co/pivokazi/bAgghch/td_auto_insurance_login.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pamajaxa.epizy.com/40646255347.pdf
    • http://dikekonigexixa.epizy.com/54068774945.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012c1b.bin
85c9e51167542fba8914bdf9c8b3a2634ec0a6af69ea36e46c3501ff57da6a99
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C1B 16888 bytes
font_00_sfnt_off0000f85d.bin
bffadf4fd616684c67efa5f530a7a6861ccd319067ecc7b9aaefbded313c66da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 5004 bytes
font_01_sfnt_off00010958.bin
00b7d5d7fcfdc02908e5f9d767c933a75c5650abe085177c873d9f61ea3ae374
pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 10140 bytes