Malicious PDF — malware analysis report

Static analysis result for SHA-256 406e7fc4b435bf5d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 12:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f716abd80645e31780f1168fb378b5 SHA-1: dba192adafe906a46d15eb9ae6aaa485d944656b SHA-256: 406e7fc4b435bf5d11aa7d971213a23a71086765117e594b4144daf632c57bac
96 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, specifically as a phishing trojan. It contains an embedded URI pointing to 'botokaw.ru', which is likely used to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to academic resources, aligning with common phishing tactics.

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://botokaw.ru/wix?keyword=statistics+for+the+behavioral+sciences+10th+pdf
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/2650047.pdf
    • https://mopepeserowote.weebly.com/uploads/1/3/4/6/134621402/naragafenafigunupif.pdf
    • http://sopisafexuj.sportsontheweb.net/pulukixejekil.pdf
    • https://xitetufiwirisax.weebly.com/uploads/1/3/4/0/134041449/3896043.pdf
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/33836.pdf
    • http://tidexozi.22web.org/learning_american_english_conversation.pdf
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/kisixatuserun.pdf
    • http://nomiwiturej.getenjoyment.net/4692045609.pdf
    • http://vizilirudigub.getenjoyment.net/panasonic_toughpad_fz_g1_user_manual.pdf
    • http://radanukodufam.22web.org/chegg_q_a_answering_guidelines.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lolaritemukole/36971330663.pdf
    • http://sogurorirerew.onlinewebshop.net/maus_parte_1_espaol.pdf
    • https://uploads.strikinglycdn.com/files/2c6ebae2-9244-44a3-b563-d7145cb61c27/how_much_does_a_schwinn_bike_cost.pdf
    • http://bufijonewufo.onlinewebshop.net/derobenadugonidunifup.pdf
    • http://wuriwafu.epizy.com/tutifolusotaw.pdf
    • http://kaseborodemo.rf.gd/template_curriculum_vitae_menarik.pdf
    • https://s3.amazonaws.com/xipavir/hernia_inguinal_scielo.pdf
    • http://sazebufaz.atwebpages.com/zowisevonukege.pdf
    • http://pimimozoji.myartsonline.com/feelings_and_emotions_esl.pdf
    • https://uploads.strikinglycdn.com/files/7c32804a-1c63-464b-b83f-1705864e73e2/pobre_ana_in_english_chapter_8.pdf
    • https://s3.amazonaws.com/kuxuxemu/can_you_clean_furnace_ignitor.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_off0000f2a5.bin
31c887ab471352ccf30e26f23053d99d79a8aedbac97f4ed5a17f07c06ab802e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 5740 bytes
font_01_sfnt_off0001062f.bin
6d2e0b00b472b0ae9e3408c6a1a1d36f6a2329ceac26f4c56f717fba143dfdc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 10764 bytes