Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9bbadc05f947bf…

MALICIOUS

PDF

74.6 KB Created: 2021-04-10 19:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2051809eb78233dcf92b283d06356f7e SHA-1: d920ff6f2471ec839c439dd7e982aab0b322554b SHA-256: 2f9bbadc05f947bf3b77f2920cd3b00606bfae34689ab2e6404d615ba16181d9
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains references to 'rock band 4 xbox one for sale' and 'wkhtmltopdf', indicating a potential lure for users searching for such items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=rock+band+4+xbox+one+for+sale PDF link annotation
    • https://cdn.sqhk.co/patagarinixa/Rhcigye/funny_puppy_pictures_with_quotes.pdfIn PDF document text
    • http://prosucre.pro/xujof9clfw.pdfIn PDF document text
    • http://vengriya.space/ejercicios_fisicoculturismoogvlt.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/jfKhdK1/zozorizotivugesobam.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/hR6jhge/rescue_machine_game_level_13.pdfIn PDF document text
    • http://letnesil.xyz/car_racing_games_video_play1fcmz.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/4fb09f.pdfIn PDF document text
    • https://juruditusevowe.weebly.com/uploads/1/3/5/3/135329261/jitepemuwumako_tinob_kirovejufoluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/gcidcF3/boomerloop_the_loop_video_app_gif_makers.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/ihdVb9J/gadebo.pdfIn PDF document text
    • http://scrlt.xyz/conversion_de_medicamentosqaiue.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/gejEiaH/offline_voice_assistant_for_android_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_052f3caef9f14622bcb9ece0e23531a7.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_92ee000f3b124ef5a30684788df58827.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d5723c-f00a-49a7-a048-de96776f2283/siwepawimojaboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461d96a5-5e16-40ae-9bfb-494b13aeeb14/86887872547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17800cbf-150e-4760-a4a3-9d1ab5848806/33260013610.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_e95a54f637bb4826a65a4fda6545041e.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_a32f57481ced4426afcab0f39444ef4d.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 5380 bytes
SHA-256: f5cb23310e16fb60661bd60c268d879cd20410c65942ab2d27e88fa9bde99497
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 11348 bytes
SHA-256: 92a90f581d030ddb933b30cd03b15c5ee7e4bb4a912fed97e427532f68f93e30