Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6b974a4abd8dbb…

MALICIOUS

PDF

88.4 KB Created: 2021-03-15 07:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80de035eecfca14105cf45195c3dd00b SHA-1: 727b00b420dc2657eccbc721bffe286f12af2834 SHA-256: cf6b974a4abd8dbb9f9e1653be6cc49b6bed940625a67a2ca3e84cc2a24f7748
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://jumiwimov.ru/wix?keyword=dead+rising+survivors+keep+dying` suggests a phishing or malware distribution lure related to gaming. While no scripts were explicitly extracted, the PDF format and the presence of embedded URLs are common for delivering malicious content.

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://jumiwimov.ru/wix?keyword=dead+rising+survivors+keep+dying
    • https://cdn.sqhk.co/vopofuxo/pTNKFid/pc_games_download_for_windows_10_64_bit.pdf
    • https://cdn.sqhk.co/gobajejuz/chab4J0/xokeguder.pdf
    • https://cdn.sqhk.co/temirikuji/jcPkTgK/ww2_webquest_european_theatre_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5ff1ccb23fd9e.pdf
    • https://cdn.sqhk.co/xewafazuk/hhjjgKY/63265796693.pdf
    • https://cdn.sqhk.co/lodikorep/Xgcg1gi/mario_and_luigi_running_mario_maker_2.pdf
    • https://cdn.sqhk.co/sabiwizi/hg8mkhe/44352451185.pdf
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fe83f9964201.pdf
    • https://cdn-cms.f-static.net/uploads/4500432/normal_5fd7f8c6cd5db.pdf
    • http://mosubulopig.iblogger.org/book_on_astral_projection.pdf
    • https://cdn-cms.f-static.net/uploads/4378382/normal_6032f2a3135dc.pdf
    • https://cdn-cms.f-static.net/uploads/4444864/normal_600d8ff759034.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dabatisew/puzzle_page_challenger_crossword_answers.pdf
    • http://xanuravafobim.rf.gd/15343349624.pdf
    • https://s3.amazonaws.com/lotibabakuj/34443668672.pdf
    • http://gojexigubobe.epizy.com/mixed_conditional_sentences_worksheets.pdf
    • https://s3.amazonaws.com/fajixe/bluetooth_app_for_pc_windows_8.pdf
    • http://kovawasokagi.epizy.com/zidumakutozakuvuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d15.bin
78a80f64f659a12ad03b90cfcf4e9554932e07437da00af20ead5cacc0970e12
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 5120 bytes
font_01_sfnt_off00011e9c.bin
d52cbf4c881684a08ac25d7f36e4ada93a61874ba3aa7f42069135734560aeba
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9C 11720 bytes
font_02_sfnt_off000146a2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x146A2 4324 bytes