Malicious PDF — malware analysis report

Static analysis result for SHA-256 716bd9fd72e682fb…

MALICIOUS

PDF

74.8 KB Created: 2021-03-24 21:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 199952f7a3b9bfeb01a10f154c0bb98f SHA-1: 3714ae67755c445ae46f3e21b622dbb0263aa0d7 SHA-256: 716bd9fd72e682fbab879bdc6c61f4e2b1e827741eeed28bdc87c3d069e4732d
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. It contains an embedded URI pointing to 'vilenefex.ru', which is likely used to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Tamagotchi on pet guide', which is a common tactic for disguising malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=tamagotchi+on+pet+guide
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fe276ceb4358.pdf
    • http://lutekorudafu.iblogger.org/46947143616.pdf
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/wurudovusa.pdf
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/xolidepavajijuramoko.pdf
    • http://molosorew.iblogger.org/3502675506.pdf
    • http://kujotekog.iblogger.org/job_interview_questions_tell_me_a_little_about_yourself.pdf
    • https://static.s123-cdn-static.com/uploads/4467036/normal_60035de739515.pdf
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/vovufofu_lunufimuxuje.pdf
    • https://cdn-cms.f-static.net/uploads/4496216/normal_60315ec423d3d.pdf
    • http://mesanezedid.mypressonline.com/garanopasez.pdf
    • http://benosetib.iblogger.org/10452601513.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_60559464a91ec.pdf
    • http://gozipoxeget.iblogger.org/learn_applescript_the_comprehensive_guide_to_scripting.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bidusibebawuz.onlinewebshop.net/build_my_life_passion_chords.pdf
    • http://vamudijikepefos.rf.gd/nadeledibe.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_ca29a289cd17406e857637192fe12cb7.pdf?index=true
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_ede91ab197b242e1b273e53cb5b6cac9.pdf?index=true
    • http://vorowoluxeku.rf.gd/87172813507.pdf
    • http://vavuduzika.epizy.com/tupekijezekut.pdf
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_19177086ef8644c492004df67050605d.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_off0000e7b6.bin
dba871df94323a642c28e261a3cc3a49f5c03ac29f450e0a0613866fc80f16c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 5128 bytes
font_01_sfnt_off0000f908.bin
3b731185ace1bf0f7622203cbfe57c7ed6066eb09f8520402f88973494d38cd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF908 10892 bytes