Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cd6e97cedf9ae6…

MALICIOUS

PDF

78.9 KB Created: 2021-06-02 21:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf136f77e3085e8549218ed169cda46 SHA-1: 2def599fb5ccb425312eda8cf16ac4f4ec00ea4c SHA-256: 78cd6e97cedf9ae6396510aa102846689a02a4d923c4237dbd2f7a34abb3d3e4
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, disguised with a movie-related term, likely leads to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=safety+not+guaranteed+movie
    • https://cdn-cms.f-static.net/uploads/4383689/normal_605ef958f1b49.pdf
    • https://cdn-cms.f-static.net/uploads/4449973/normal_6055097c963cd.pdf
    • https://cdn-cms.f-static.net/uploads/4457843/normal_605cd11f20bfc.pdf
    • https://cdn-cms.f-static.net/uploads/4493890/normal_6067fd122b84c.pdf
    • https://cdn-cms.f-static.net/uploads/4408340/normal_602a447ba6c37.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6043389c089bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sijomirurefi.pbworks.com/f/17437663409.pdf
    • http://palejemevat.pbworks.com/f/wupiwimilabuwo.pdf
    • http://garigor.pbworks.com/f/vida_y_muerte_en_la_mara_salvatrucha_chapter_1_summary.pdf
    • http://natizasex.pbworks.com/w/file/fetch/144412263/9805275689.pdf
    • http://wuvebag.pbworks.com/w/file/fetch/144427191/tepixagosituxozidamafuz.pdf
    • http://sajateves.pbworks.com/w/file/fetch/144451194/the_crew_2_hidden_cars_locations_map.pdf
    • http://tarogifere.pbworks.com/w/file/fetch/144487806/download_ieee_1284_controller_driver_windows_7_64_bit.pdf
    • http://zikasamu.pbworks.com/f/60784289024.pdf
    • http://gulisapil.pbworks.com/f/915835357.pdf
    • http://dibesusajob.pbworks.com/w/file/fetch/144470874/kokodepedakabusava.pdf
    • http://jebodigezev.pbworks.com/f/juzud.pdf
    • http://vazesuna.pbworks.com/f/cst_studio_examples_download.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144413280/panawu.pdf
    • http://dibesusajob.pbworks.com/w/file/fetch/144470787/unguarded_book_mithali_raj_free_download.pdf
    • http://lakebimutep.pbworks.com/f/65413323596.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_off0000f5a2.bin
d3af5a09935bf18a6e8bf12d17c4e82ad1cda11cafa963369bc9f577a30fe04e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 5284 bytes
font_01_sfnt_off00010796.bin
8ec75fee74bd10416fee2607c38f1b152a5c30208559a29d899d9f774fc8ec9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 11480 bytes