Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfbb07c06bd5ce4…

MALICIOUS

PDF

72.5 KB Created: 2021-03-29 16:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e034e17186589a651af16251f9d4ed SHA-1: d2a59ef4a7a32c6f9b311022992bc7d2c5aca877 SHA-256: 3bfbb07c06bd5ce489d76a642b3e20a6865b2d0dc8c8c1b18e1bd9988a7d6bf3
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://zajinet.ru/award?keyword=stable+angina+pdf` suggests a phishing or scam attempt, using a seemingly relevant keyword to entice clicks. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to external, potentially harmful 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://zajinet.ru/award?keyword=stable+angina+pdf
    • http://wusefarowakuzux.iblogger.org/38984442301.pdf
    • https://cdn-cms.f-static.net/uploads/4418567/normal_600e7caeb8776.pdf
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5ffe46da50036.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd2678e0ffc5.pdf
    • http://peluxuba.sportsontheweb.net/35226040611.pdf
    • https://cdn-cms.f-static.net/uploads/4412757/normal_604aaedba439a.pdf
    • http://bupimobim.sportsontheweb.net/concept_of_curriculum_development.pdf
    • http://vewarisowavagav.iblogger.org/how_to_fix_a_furby_connect_that_wont_turn_on.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_41799cd66db34c3bb239e836665811c3.pdf?index=true
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_4e97508515b4407eba6a2f0222901018.pdf?index=true
    • http://vudazirukileri.epizy.com/zilamuzonewimirisulavasi.pdf
    • http://zulonojaminipe.rf.gd/pabaja.pdf
    • http://penanaras.myartsonline.com/arduino_unowifi_r3_robotdyn.pdf
    • http://xapowigi.epizy.com/37740613277.pdf
    • http://wufasimateli.epizy.com/bujonanesime.pdf
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_42a5748bcb1d410cb21de7f2fa45c419.pdf?index=true
    • http://gavawekib.myartsonline.com/vixojebipeb.pdf
    • http://xadeboni.epizy.com/93759878520.pdf
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_22a444865dd9484982ba7ab02bb48a57.pdf?index=true
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_6a84913819384cc0bf8133c8cb2c6899.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_off0000ddab.bin
935da53a23b247fdd8b0fb3213ffd945f42ae52a9f39f6e3333882b26fc4ec68
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 5176 bytes
font_01_sfnt_off0000ef5a.bin
1d8703276c4a1f7e19bc38acbdbb3d29c0793b99b200b6ee29e6f0ee2333279c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10940 bytes