Malicious PDF — malware analysis report

Static analysis result for SHA-256 088907021f2c2253…

MALICIOUS

PDF

71.8 KB Created: 2021-09-17 15:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c74a3cbaf596bb2f7f726d6e911c0e33 SHA-1: 7b9ced77d98c6b4b4ef75e23b435aebd3fb99d28 SHA-256: 088907021f2c22530f581136e9a9191b99e59acdc35fc65641a831b3f8b7188e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://gbp.dropship-online.com/userfiles/files/37375585996.pdf In PDF document text
    • https://rajakedua.com/contents/files/lawibil.pdfIn PDF document text
    • http://dfanchem.com/upload/files/81149996649.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/nimusenij.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/nakivokukekow.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/taburukujafam.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/14602114509.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/84586176670.pdfIn PDF document text
    • http://skncn.com/u/files/rowufofopevovupedezamaloz.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/burejiwipavurukizinavar.pdfIn PDF document text
    • http://mobil-tech.com/files/91583689224.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/dikek.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/xekew.pdfIn PDF document text
    • http://yejida.com/userfiles/file/45580087775.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/99666431120.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/fodaxobekavaruvumipuwaxu.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/mavaredidana.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161414ac8c4a9a---69911614392.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/13440166716.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/38666087701.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/nobasobu.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/wejapofiniwapagono.pdfIn PDF document text
    • https://mahae.hu/files/files/26150938784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=jurassic+park+operation+genesis+apk+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 16956 bytes
SHA-256: 4e7f7ece5a81fe41fa7ca3dc19f1880c820a6208d32cc187b95e9e42e7ad72b0
font_02_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 10824 bytes
SHA-256: c649e8b07aa62df5c01beb1b2a1a17f50ce7754a0e422fbad3b3ff89c95aecda

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