Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15be9d2423ded62…

MALICIOUS

PDF

90.5 KB Created: 2021-07-01 13:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 14d8562cd2c1ef17014c7a997ae66665 SHA-1: d3a9e2e50ba206973fa9209c1fd612ed184256d0 SHA-256: c15be9d2423ded623752212d1b5922af86606b3599576fb39c594ba97e6d5a57
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to host malicious content or redirect users. The presence of a callback lure indicates a social engineering attempt to trick the user into initiating contact, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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) or Microsoft license-boilerplate 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://ttc-investco.com/img/files/ravunutanoxoma.pdf In PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834ee0c5d06---bijezep.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/87c5c3da1e715bec6b38f54312c9174d/nadukaxexupozagixu.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/b2efacc08eb40bd4a6e97f3c515fe361/pejawawopujowuvedi.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/12642818661.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f226e63430---57088336987.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eb5b85bac---77551022167.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf07858a1---5561895348.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf03950e40---tuvofuvosibu.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0701562001620396174.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/pekuxuvijorugagekuvi.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/saledonowobakopin.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cf4baa04---bomagitokasagikewagiguxa.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c53d7302146---16063332305.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90e25b966f---finaluzonagumeradigakokix.pdfIn PDF document text
    • http://apcmagon.com/userfiles/redovowaxufodonezinazose.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/rasiwulapigefox.pdfIn PDF document text
    • http://navigator-33.ru/media/file/45627593566.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/f9167a37c37090e84373a2d812d1b0ee/tawarenimugikovuzari.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e1102e76---zegenebaxijebupasopibuge.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/27047232957.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/70684211381.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/59510417570.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16088d6e12a952---xiwadaleraret.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a277fae7b21---98839471921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=short+quotes+for+instagram+postPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 11080 bytes
SHA-256: 08fa5ef0e2021c7111e8e013e717e1df59dc33cfac22e32a864c9aeb10af561c
font_01_sfnt_off00011724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F36 17208 bytes
SHA-256: b53c09cdee71af66eaafe9b1ab8cd319c714d0a385dcb4bb8aca385361af46e0

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