Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f40b8f8cbe1a7a2…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 13:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c6f1222d0dd29766ceac6495e30d3a SHA-1: 57e4c8624b08fa469d099be392a1c1f41c7dea12 SHA-256: 2f40b8f8cbe1a7a26d15a21acd456454d5525469d16180930e5ffadfcc3fa996
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being https://kuzutuzo.ru/award?keyword=anabasis+deutsch+pdf, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to an award or document, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=anabasis+deutsch+pdf
    • http://vopugixeroramox.medianewsonline.com/memorizao_mnemonica.pdf
    • https://cdn.sqhk.co/wotabefej/jiUdieN/the_sediment-_hosted_stratiform_copper_ore_system.pdf
    • http://xufuxenu.mypressonline.com/budapest_tour_map.pdf
    • https://cdn.sqhk.co/gilikomow/MsUjahi/navy_eval_brag_sheet_example.pdf
    • https://cdn-cms.f-static.net/uploads/4494868/normal_5fd782d9b6be3.pdf
    • http://zutolewe.mywebcommunity.org/pozadarufabatinedumad.pdf
    • http://guvorib.22web.org/fellowship_of_the_ring_journey_book.pdf
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6039f172803b8.pdf
    • https://cdn-cms.f-static.net/uploads/4495696/normal_602452abc7dba.pdf
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5fd11570e8d14.pdf
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085e25b87d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_1dfb1f10e6ea4e94865234ed2d6b86b4.pdf?index=true
    • http://leperipuf.rf.gd/ley_de_ohm_watts_calculadora.pdf
    • http://nafakosoleg.epizy.com/93451298015.pdf
    • http://kemesuxaw.myartsonline.com/jbl_boombox_user_manual.pdf
    • https://235a1a37-2bc9-4d3b-8f1d-d3952ad9fba8.filesusr.com/ugd/3111f7_8aa81f63050c477883665ec94d18092b.pdf?index=true
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_253898975ca548a38672169d77214e9e.pdf?index=true
    • http://tedipokexumo.epizy.com/what_is_the_main_idea_of_sojourner_truths_speech.pdf
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_aff3bdc3042f436a88e75a47bc28bf96.pdf?index=true
    • 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_off0000e3f8.bin
ebb9f7d017771ddf1831958f19e9abe6e58771e6faeb23170bd9030d08700cac
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 5244 bytes
font_01_sfnt_off0000f5d0.bin
9d697e46e656148b14590eabdb0e1a3695c9476cbde44eb33279421c44f582fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 16036 bytes