Malicious PDF — malware analysis report

Static analysis result for SHA-256 679febb5b49ce036…

MALICIOUS

PDF

99.9 KB Created: 2021-08-16 18:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9de3c64fb8a2cc91daded203630ef8a1 SHA-1: a03654a2fafe0a6044d422fddb6b3ffcf6621a8b SHA-256: 679febb5b49ce036c2d308bfd7c550ab9a319b2846f036aee1f19596a4518a02
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an effort to obscure the ultimate destination. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to prompt a phone call, a common tactic in tech-support scams or refund-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://patronusalapitvany.hu/public_html/upload/rivujibove.pdf In PDF document text
    • http://cn-polylysine.com/d/files/39747836447.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/76089455010.pdfIn PDF document text
    • http://chapelguild.com/images/usr/22691235882.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/vpuppfc2c1hn9eponb8ilfj7o6/razozitarikobofejor.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/5lj50597899osmf9q3qlk2v3v9/bavifunevimoxekefin.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7eb980bf38e5847020192332b4a52c85/jeruvosemixubapujekado.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/vazaxawol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d61b56c25---36172933041.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858c8389627---lijewegisonebawukutim.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/e8ih1c594047oqqnitu03pfn39/4382006654.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/17844506671.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/880b498c94b9f0efb11b1724a2303b27/jarijalokoludaziw.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/75625802673.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/dadikezivi.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0fa756c4---77102654982.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/liwowozefoviwu.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/91cc07bcb858207b92c7efb5f4a95594/65299665391.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160cff9ce4c075---mawotomajodijeviwobipowu.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/m77hdggs81fhqu24koug2lo7vf/5231497667.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/64792543798.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/niguk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pnc+bank+ira+beneficiary+designation+formPDF 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_off00011b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13356 11120 bytes
SHA-256: a4a9f49da017194c70751e4eb66f0ae619af07bdedd66bc951a9c7a033b6c927
font_02_sfnt_off00014d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D29 19544 bytes
SHA-256: 1422457cba206b9f53a85f41bf24dc6530fd3f32c0c42a3cad5c82e067697f48

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