Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30cc33815e562e6…

MALICIOUS

PDF

99.2 KB Created: 2021-07-19 13:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0eddb1197811472f69f3e74740ff699a SHA-1: b6e51198640c165adab025dfe35b375e9ba9167f SHA-256: f30cc33815e562e6c7db1aee498609d4eb6dd5695fa0add39a66ad65b281f704
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple compromised upload links suggests a coordinated effort to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ubkdtvrnmtg2acsfmb2nckoad3/90426093983.pdf
    • http://studiotecnicoprato.eu/userfiles/files/55774496573.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095721829764---89199880183.pdf
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/fiposetawakibefavoxote.pdf
    • https://birsamundapark.in/userfiles/files/nufabosakares.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/baf55db8a7931362dff866487a9073c5/22202659453.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/92815244558.pdf
    • http://blackivy.pl/userfiles/file/43410158534.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e06dce06b796491e91d38145e6648133/xosusaxuru.pdf
    • https://arredamentigiacobbe.it/file/fijamuziwofatiluxerorusug.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088176f94086---tasezagubojigugulokavo.pdf
    • http://bundoreh.com/fckeditor/files/file/futona.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4e9b6bc3c4ba4a43d96f159e6414134c/19042197058.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/3d5670fad3731d440baf5c5631128148/boxidata.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/ae8f2cd35d5c3161a762df402a3f9c85/20262859063.pdf
    • http://uk-finansist.ru/userfiles/file/98768107027.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/94b3c4bbe1318028a56432a90bb69f65/vafekaxamufanedinaji.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/tqu1c6rncesmvb77m4id6jslh9/vifutatuvurinuzipigorovu.pdf
    • https://cowichanseniors.ca/userfiles/file/nolixudosivigonol.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721f51d3e66---vozepimusesemolasaw.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/267fa35b6ce2c8f93f328f3b3c4393a6/jonujomadugodenise.pdf
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/12007937042.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/65bf5bb8730bd7eb9a111cac1f5fbb6a/vemij.pdf
    • http://pandoreunion.com/clients/81456/File/98218530759.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a589d8e13d6---vekajofix.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a1fcd212---zijikukubovapazas.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=un+lider+no+nace+se+hace+ted+w+engstrom+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://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_off00011b19.bin
e20ba0b790388c93896a639d6b94a6de0ba843a342e358626163177a8fe96c51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B19 11160 bytes
font_01_sfnt_off000134c8.bin
b1c18ff872a1be19701c479a24464b5906bf33b1a74c55b55ae478f924f119e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x134C8 19100 bytes
font_02_sfnt_off0001658f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1658F 16792 bytes