Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e082e841816eac…

MALICIOUS

PDF

73.8 KB Created: 2021-04-06 21:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd45f93fe4ccfa46ff5b3fe4a34a9be SHA-1: 9eb1cb3bb9a5d5c78135c94062c5f86e4a7544d7 SHA-256: 18e082e841816eac103457a3355c06b7042222a5c2828c32f89882898d90ba50
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. ClamAV detection and ML classification strongly indicate maliciousness. The document's content, though heavily obfuscated, appears to be a deceptive lure for a study guide, likely intended to trick users into downloading a malicious payload from the linked URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=accounting+chapter+9+study+guide+answer+key
    • https://cdn-cms.f-static.net/uploads/4443815/normal_6029701b3680a.pdf
    • https://vipizavubo.weebly.com/uploads/1/3/1/4/131407691/4137678.pdf
    • http://nnorm-id.com/bivogabawatizugulnzy78.pdf
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5fe564ae68c1a.pdf
    • http://kavademive.sportsontheweb.net/biviwet.pdf
    • https://vijivavepedu.weebly.com/uploads/1/3/4/3/134313627/netigawogisag-gizemagopotupoz.pdf
    • http://wildboost.club/58804918664cmpam.pdf
    • http://lightly.store/misenonijesuwetitudunipushno.pdf
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/777051.pdf
    • http://robertferrell.net/88740542651gqjx3.pdf
    • http://sikevemekoma.mypressonline.com/24134899574.pdf
    • http://zanartcc.net/41419546796c41e.pdf
    • https://static.s123-cdn-static.com/uploads/4423443/normal_5fdd9c26ac402.pdf
    • https://static.s123-cdn-static.com/uploads/4477137/normal_5feb592725d89.pdf
    • https://ruvazokof.weebly.com/uploads/1/3/4/0/134040659/8f7a09ee38c14.pdf
    • http://fionainthefield.org/life_below_zero_torrenteme3m.pdf
    • http://vurejowug.mypressonline.com/81945420506.pdf
    • https://cdn-cms.f-static.net/uploads/4452621/normal_60558c2ee3bca.pdf
    • http://mklhhhh.space/autocad_publish_to_transparency9b8cn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zoligagomuwe.onlinewebshop.net/82771753569.pdf
    • http://wipibefab.onlinewebshop.net/9017159390.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df44.bin
df02fffee0cd87516a5a7e00bf4633dca5e655408fa4deed847fcb9b9b8867f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5708 bytes
font_01_sfnt_off0000f2c4.bin
3e8a949b6f8ce1d4193e0600530f87c114772928824eaf2756d850de26fac1a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 11336 bytes