Malicious PDF — malware analysis report

Static analysis result for SHA-256 980d05209359ed23…

MALICIOUS

PDF

97.8 KB Created: 2021-07-30 20:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 751ae7b15168b0d4ed5593ae6a9ce86d SHA-1: 19f6672737b82366dd062df05077631e169888e3 SHA-256: 980d05209359ed237ba3b177af91c2d8259415ec845c704688920ff455e99fc7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, a common tactic for distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://proxima-design.cz/files/file/25646564057.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab547c4cd60---29190491222.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fab8d0787a---wilenemuto.pdf
    • http://myesen.life/userfiles/file/womasemosuroke.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16075b75eefb26---46680071779.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2fcf1102f64a8eef449af4cc747f0a31/80376707408.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891acc88c70---motozedepeviwopoxod.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kopid.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/6a46ca9173905b594ecbfe8c83e7820f/89632297292.pdf
    • https://lacecinella.com/writable/public/userfiles/file/50718334608.pdf
    • https://cortemadera.com/wysiwygfiles/file/7589149828.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b66754698---8644778080.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f26bf076---97457547989.pdf
    • https://lingchuanfloor.com/app/webroot/userfiles/files/14409048972.pdf
    • https://nsck-cykelmotion.dk/userfiles/file/gotowojetafilivegulimanaj.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/07a8b57859244b267930ce6af9b449c1/90451425288.pdf
    • http://booklandbooks.com/userfiles/file/koneko.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b269e4a040---kubibimunu.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072d02996ff1---93520504755.pdf
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/41614503687.pdf
    • http://plafondchauffant.fr//img/user/file/tufuz.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1472b83c21a84daa3cc305d62dfc305b/mobugigolavol.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/b36e2ffbe6a4256c52caebc2682a8746/90980224271.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3807903679f83547bf2ffb962aea6466/24336359892.pdf
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/41556494077.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=airsep+freestyle+service+manual
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 16792 bytes
font_01_sfnt_off000119fe.bin
94c0662e120dc5da17ac9e7f4a7489b0029b4b4a38f54bb56e7f347f04bcc09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119FE 10784 bytes
font_02_sfnt_off000132e0.bin
da79484a7f94e028a8871d907a282bdc2df095dfef79f7b1f2af1efeeab75da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E0 16224 bytes
font_03_sfnt_off00014881.bin
311b7205342dbe2cd9df6ef863648d42f8432a374dcacee1be934f0bc0233463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14881 17908 bytes

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