Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07c7a3e1bf5d8ed…

MALICIOUS

PDF

71.0 KB Created: 2021-03-29 20:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94d2ef64e31076e06179228eedff9c52 SHA-1: bce8fedc27ae5d5a304a93069549fa5b4a91d39f SHA-256: e07c7a3e1bf5d8ed74e596b62eb33add8b2b7f4080b186e3597451aabbe814a0
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high probability of malicious intent. The presence of an embedded URI pointing to 'gimoguvi.ru' suggests an attempt to redirect the user to a malicious site or download a payload. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick the user into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/wix?keyword=nikon+n90s+manual
    • http://rexasokozeg.iblogger.org/79161819868.pdf
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/6909581.pdf
    • http://naturwows.space/tas_rendez_vous_sous_ltoilesjezx.pdf
    • https://kofeguku.weebly.com/uploads/1/3/4/5/134587943/53bb3daf.pdf
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/rowitadetabego_muvurobebavezip_gigetegivola.pdf
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5fd141aae1449.pdf
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/2616174.pdf
    • https://cdn-cms.f-static.net/uploads/4460063/normal_60209deadcf52.pdf
    • https://cdn-cms.f-static.net/uploads/4486036/normal_601716a671ce6.pdf
    • http://zufonirawanowo.iblogger.org/pekagalufav.pdf
    • http://copyright-helps-team.com/how_to_teach_yourself_self_control_with_foodmtx02.pdf
    • https://static.s123-cdn-static.com/uploads/4451363/normal_5ff978b5d2af0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/091807dd-46cb-4448-b3c8-5eeea4782b8d/rikun.pdf
    • https://uploads.strikinglycdn.com/files/c2016f37-2054-40a9-a86f-6a5969a7974e/gibaguwonuwira.pdf
    • http://gonidiwofove.epizy.com/wumek.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_off0000cadb.bin
f6eaab4c92cc2bfeeefba50c02bfb5e4c6bda9904bc0510adb052a24209496fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 5064 bytes
font_01_sfnt_off0000dbff.bin
81ef9ad6d1ffedb987327c810a3cf4fb4482d2833fd01cad8ac46eac25a4cc67
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFF 2012 bytes
font_02_sfnt_off0000e59e.bin
c24c6398654bb9ea3b4627d33c8d8533a6598bbfae620e96383eb7be23dd531b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 11784 bytes