Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17bf065d9bd2fe7…

MALICIOUS

PDF

107.0 KB Created: 2021-09-19 10:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d5d18552ecb54e1ca489668c01e73c8 SHA-1: 5ce287b9239782eeac0697ac28bbeb7771b2f3dc SHA-256: f17bf065d9bd2fe73b60326c9e7aa72fbf13c6746ae2337cf369c7e925f22585
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by an ML classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains language suggesting an invoice or payment lure, and it embeds numerous URLs, one of which is a link farm designed to redirect users to potentially malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://riph.pl/userfiles/file/kibusifanimonok.pdf
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/24415730341.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16130ca4026849---ladikefuganenejojewutekob.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/e02653a5aa54a131fe96d92cce943c6b/51642597498.pdf
    • http://vzwsportenmuziek.com/content_docs/34469528259.pdf
    • http://www.bash.cl/media/file/lewakodusuxiwumimovol.pdf
    • https://tallerescarrion.com/uploads/file/vafutinenosoruna.pdf
    • http://cheliabinsk.realxenon.ru/uploads/files/tutubawagefexujisariniwe.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/76804657007.pdf
    • http://graviroz.hu/ckfinder/userfiles/files/solamitira.pdf
    • http://montoaneli.com/ckfinder/files/zurujemamiza.pdf
    • http://pronobile.de/catalog/file/92881286468.pdf
    • http://pkpneu.cz/userfiles/file/jepirofi.pdf
    • http://sea-cruise.ru/ckfinder/userfiles/files/xedonakibunanaj.pdf
    • http://cupta.org/userfiles/files/20210907084804.pdf
    • https://ilonew.tasksplan.com/userfiles/files/97602935130.pdf
    • https://aptitudeclass.com/ckfinder/userfiles/files/49591787525.pdf
    • https://tennis-samara.ru/img/file/jekazijimasozed.pdf
    • http://appartementslisa.it/an3_Uploads/file/sogijewijigigufoneve.pdf
    • https://toptenstudy.com/upload/files/BodyFile__61370EA57D21F.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/73582076432.pdf
    • https://www.jdconstinc.com/ckfinder/userfiles/files/retepinimupefewole.pdf
    • http://norrlandet.se/userfiles/file/72329059207.pdf
    • https://ww150003.linebot.net/upfile/files/20210919095253.pdf
    • https://pkmoscow.ru/ckfinder/userfiles/files/janimowiliwupeluxeriki.pdf
    • https://szekszardportal.hu/userfiles/file/fagalokalasaforug.pdf
    • http://www.saletime.gr/admin/fckfiles/file/9615607595.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/80867377868.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=coin+master+hacks+2021
    • 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_off00013b40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B40 16792 bytes
font_01_sfnt_off00015357.bin
fc1b53283193a4de1f3c489685657f7627da89a602eb8d5983aabc80d3f201cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15357 10868 bytes
font_02_sfnt_off00016c62.bin
b69481b71160811ddbdbf053dd37016c8ef53f7540c7c5884d6e844bd39b8fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C62 19112 bytes

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