Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed111ac16b1991f…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 21:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beca8921616a05155257f1ce3226a567 SHA-1: 91432d64b3bd2bca1d6d9ff22270362daba82686 SHA-256: 9ed111ac16b1991f5ae27f256cbe38a71ff77b18f1d4df213494b1e2a58560f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of external URIs and the link farm characteristic suggest the document is designed to redirect users to potentially harmful content or facilitate SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.alborada.es/ckfinder/userfiles/files/90227352991.pdf
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/96125689182.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f1edb6bbb---76669411432.pdf
    • http://myslizdrave.com/soubory/bosarorabesijibanidopibu.pdf
    • http://kronospan-mofa-hungary.hu/editor_up/27698285375.pdf
    • https://excore.hu/ckfinder/userfiles/files/13653181656.pdf
    • http://vibrator4you.cz/UserFiles/File/41783059718.pdf
    • http://career-id.org/ckfinder/userfiles/files/70394606972.pdf
    • http://olympicthesportshop.in/uploads/70804637479.pdf
    • http://tryinvest.eu/userfiles/files/gigebosilipusimel.pdf
    • http://jca-t.com/fck_image/file/31876968010.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a753e3838f---sozirupen.pdf
    • http://mhzsolutionz.com/userfiles/file/darerofataxaxoxoxoxegi.pdf
    • http://agriturismoilnoceto.com/userfiles/files/foziriwa.pdf
    • https://fultoys.com/userfiles/tatetoratigefoga.pdf
    • http://clubselectionvoyages.net/images/file/83476638814.pdf
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/xapogoroj.pdf
    • http://tajeer.co/userfiles/file/78151985710.pdf
    • http://studiomuraca.eu/userfiles/files/18494496049.pdf
    • https://medarbindia.org/ckfinder/userfiles/files/42011226382.pdf
    • https://walnutcreekguide.com/wysiwygfiles/file/93314925366.pdf
    • http://pelejas.com/IMAGENS/CKFINDER/files/nelodizerojadovaduja.pdf
    • https://abcoegypt.com/userfiles/files/10678426538.pdf
    • http://fotocaroli.it/userfiles/files/wugurefok.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=insidious+2+streaming
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae2f.bin
72689ce982a5d80556a9ff2efdf74777f0feda2a467ddff3b78981c0c7df506d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2F 14556 bytes
font_01_sfnt_off0000d2cf.bin
0cee28082fa743660e98396e27d907ab49343ce4352b12d937222e00b39458a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CF 10716 bytes
font_02_sfnt_off0000eb46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 16792 bytes

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