Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2218a9df843228…

MALICIOUS

PDF

76.7 KB Created: 2021-03-30 01:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 590a192d1c7708209c0c97fb3b614444 SHA-1: 509b338f13b4a1d31852ac9603234b9318d6ffb1 SHA-256: 6c2218a9df8432289514c485c929e1e5c3430177c57b632370e66ebd20b73d5c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'geometric probability formula calculator'. The presence of numerous external URIs, including one pointing to 'kuzutuzo.ru', strongly suggests this document is designed to redirect users to malicious content or phishing sites. No scripts were extracted, but the PDF structure itself likely contains exploit code or malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=geometric+probability+formula+calculator
    • http://dipukud.iblogger.org/puvefopebopotiwuwitorawud.pdf
    • http://lajukizodar.22web.org/35858733017.pdf
    • http://wexonosuzovub.22web.org/payroll_management_system_documentation.pdf
    • http://lunotikipadul.66ghz.com/wefunikugarerodoxikogalaj.pdf
    • http://budokudepa.scienceontheweb.net/first_conditional_imperative_exercises.pdf
    • http://lunurapezos.iblogger.org/video_maker_free_filehippo.pdf
    • http://lesagotefawa.22web.org/18236280186.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fifuto/baveke.pdf
    • http://faxiwig.epizy.com/dasugiwuga.pdf
    • http://lipitesagodat.epizy.com/27400954111.pdf
    • https://uploads.strikinglycdn.com/files/c6ad3911-b386-4995-82e9-0dc220468c22/19254000309.pdf
    • https://uploads.strikinglycdn.com/files/9f0bdc7b-49c7-4668-885f-36d3471719a7/photoshop_command_key_not_working.pdf
    • https://uploads.strikinglycdn.com/files/107a9ddc-5fcd-4723-90fa-dc13967f576c/41580124620.pdf
    • https://s3.amazonaws.com/wefadep/156345060.pdf
    • http://wozimape.onlinewebshop.net/tirinaboropov.pdf
    • https://s3.amazonaws.com/wikurixobelu/kermit_the_frog_meme_format.pdf
    • http://vujuvisesakok.myartsonline.com/kebufelakivirixifurijuxa.pdf
    • http://ramapenutizawa.epizy.com/96137490293.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_off0000def5.bin
b6d26bd4fc35465fd353b10a6cb6575df4b63bbecc8d00dd4badb0769d74fd01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5032 bytes
font_01_sfnt_off0000f020.bin
1ab5f634c7472e2307d29f33a1ee1cfb1d778b3c97ae849c54b38491e37e4e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 11572 bytes
font_02_sfnt_off000117bb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.