Malicious PDF — malware analysis report

Static analysis result for SHA-256 208765222d23edf7…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 10:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b7aa9baeca3e9bc08f57096f2f1f6e SHA-1: d25bce0adcad7bb4cd4e868c551ab2ef55f0a030 SHA-256: 208765222d23edf7931e40adc8b6a12125757191c028208a273bbb27435b476a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a page offering a "Yu gi oh duel links hack tool", indicating a social engineering lure. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to facilitate the download of a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dafemum.ru/wix?keyword=yu+gi+oh+duel+links+hack+tool
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5ffd8351cadb0.pdf
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5fec9be9d763c.pdf
    • http://dorutote.scienceontheweb.net/37362045305.pdf
    • https://cdn-cms.f-static.net/uploads/4409110/normal_6036a3f81bb2a.pdf
    • https://cdn-cms.f-static.net/uploads/4375696/normal_60135b1441603.pdf
    • http://rowowesofazov.medianewsonline.com/which_of_the_following_statements_is_true_regarding_cost-plus_pricing.pdf
    • http://dulugidi.iblogger.org/stihl_bg86c_carburetor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_4e4fca555155416482093d4d4656c2b9.pdf?index=true
    • https://s3.amazonaws.com/tiniruru/nemuxebaxa.pdf
    • https://s3.amazonaws.com/guwutivupudutu/android_appcompat_dependency.pdf
    • https://s3.amazonaws.com/xupimaral/gavoboxolekibogitiremap.pdf
    • http://webixulibuka.rf.gd/36041976020.pdf
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_65df790242f34ba28cc781468f9b260b.pdf?index=true
    • http://pevipitoz.atwebpages.com/bomabofu.pdf
    • http://batapijas.myartsonline.com/3616539980.pdf
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_621f12542b2b49b4923d9d5acec69bb9.pdf?index=true
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_191cbbda722043b0bef7c200b5445a75.pdf?index=true
    • http://zodofujeki.atwebpages.com/mpsc_marathi_books_free_download.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e27d.bin
e1e1675fec264e0d76eccf9b7f1b86c4d62c08d9d21aea066f099e25e8abf01e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 5132 bytes
font_01_sfnt_off0000f3f4.bin
38456eeffdd7e54fc5dadf2949c4f8f8fd0454c02ceee493deb26abed91764b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 11180 bytes