Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83b130226310707…

MALICIOUS

PDF

100.8 KB Created: 2021-03-18 05:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc0162938148daf2e71e250d1ecb34b2 SHA-1: 77361fe81fb662ec646b8aab5b5bd3e4263e1127 SHA-256: c83b1302263107076ef710fabd09b21d311b98f79ee105420b20f39d74620a2e
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a website disguised as educational content, likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://botokaw.ru/wix?keyword=how+to+be+an+outstanding+teacher
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5fc82dc9cd648.pdf
    • http://mesretly.xyz/butterfingers_album_freex54un.pdf
    • https://cdn.sqhk.co/gosuzufus/dw9heij/3503608443.pdf
    • http://kugaraginoja.mypressonline.com/lewulenojijujunulolo.pdf
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fef1a1c2f31c.pdf
    • https://cdn.sqhk.co/napumefu/gQjcMrG/sorojuxukotetujoxejoxa.pdf
    • https://cdn-cms.f-static.net/uploads/4495860/normal_601802c6254c3.pdf
    • http://aarbuz.space/ghost_rider_live_wallpaper_free_downloadymhvl.pdf
    • http://mnogolidov.xyz/sufowejonr949.pdf
    • http://nuloriwilorij.scienceontheweb.net/73290538294.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wifiduxezo/sidererasakanuwuf.pdf
    • https://s3.amazonaws.com/viregujipowuru/descargar_musica_de_anthony_santos_viejas_mix.pdf
    • http://lofunadex.myartsonline.com/90536880236.pdf
    • http://buzanuziti.myartsonline.com/how_many_cold_cranking_amps_for_riding_lawn_mower.pdf
    • https://s3.amazonaws.com/jenisozazewubo/67599001462.pdf
    • https://s3.amazonaws.com/gujutavevive/army_tank_games.pdf
    • https://s3.amazonaws.com/jefazaxal/37251043559.pdf
    • https://s3.amazonaws.com/fazujo/61030130338.pdf
    • https://s3.amazonaws.com/liluvad/48414859501.pdf
    • https://s3.amazonaws.com/zobuwubedak/62895419440.pdf
    • http://solejow.myartsonline.com/zibimiwawavodipal.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_off00014348.bin
1a455acd0ae1e8a9e8bcb70b20064cddbd4a014b9fd70e6787b4689a7b6fab7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14348 5360 bytes
font_01_sfnt_off00015582.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x15582 1800 bytes
font_02_sfnt_off00015e12.bin
1f20ae36885e3cb27067619dac89c6ee289da571bdaf797ba5d7b9f93717d29b
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E12 10888 bytes