Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df3788b946c5e13…

MALICIOUS

PDF

81.6 KB Created: 2021-03-15 17:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2629f417e367ab87d284ebb2603ba060 SHA-1: 265ba0fc66107d8db9ca51b30b8b1def56f6baf9 SHA-256: 7df3788b946c5e13a7405b0be16956a22136d77384f74fe294d531d6a0f8a9b5
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of an external URI in a PDF often indicates an attempt to redirect the user to a malicious site for phishing or to download further payloads.

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://soxebez.ru/award?keyword=cardiovascular+system+pdf+file
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5ff6ad89bd7a4.pdf
    • http://brumbum6.xyz/psycho_book_summaryzwg9i.pdf
    • http://mydenverneighborhoods.com/exploration_craft_3d_mod_apk_unlimited_moneys4np0.pdf
    • https://cdn.sqhk.co/vusabutam/JL7iehf/41596449818.pdf
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ff0a79b70cea.pdf
    • http://razvivatel.blog/dell_latitude_e6410_drivers_packam5ta.pdf
    • https://cdn.sqhk.co/vuzonabudad/phcrFhc/zabenalufekela.pdf
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5fceb3014884c.pdf
    • https://static.s123-cdn-static.com/uploads/4415934/normal_5fe232bb8fe8e.pdf
    • https://cdn.sqhk.co/diratukuz/CetsOgg/android_file_transfer_para_macbook_air.pdf
    • http://zagejudivavi.sportsontheweb.net/fagutosadimuliroxowarirel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxiruvud.myartsonline.com/fufibajimomodo.pdf
    • http://xafibejijopo.atwebpages.com/building_cost_estimation_book.pdf
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_6ce5530ea1c84fc8b6146ac676a827cd.pdf?index=true
    • http://kapirexazi.onlinewebshop.net/pewepoforizubowijabu.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_4cb8788dc1804c6098bd38017390ebe3.pdf?index=true
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_e5c869c32efa4f5fa5680220db660970.pdf?index=true
    • http://kisalonokexiwi.atwebpages.com/litar.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_off000100aa.bin
efcaf7cbd8b9eaf0d4830feb5a46bb3286b40aef5f88c23872d308c5abef7d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x100AA 5368 bytes
font_01_sfnt_off000112e4.bin
0845312c5c2e85ed4cee581ad5eac8e703f198f30171f0619ccf3c8e6bf43762
pdf-font-stream PDF embedded font (sfnt) at offset 0x112E4 10768 bytes