Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ce2af66aefe1f4…

MALICIOUS

PDF

73.5 KB Created: 2021-09-05 06:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7070744712c7cb21dea8de5a3817185a SHA-1: ab7cff32bcde9e72fc389a53a505bf91e92fdc2d SHA-256: f2ce2af66aefe1f41577860c474cca3bddba549cbe2abda910fef480b25dac09
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a491f9c34cd---45911149531.pdf In PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/xozir.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/wujidud.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/jamob.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/petigutoxapix.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9476d0abd---86245386984.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/45471223224.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e325a39ddc1---11256564280.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/95113782995.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/zisilabumogifawovurikinov.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cd460dfc8---nenalawi.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160827579d8ec2---25148309523.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce1112b827a---98123374749.pdfIn PDF document text
    • http://etnorom.hu/pictures/38415981617.pdfIn PDF document text
    • http://www.moyekolodin.com/files/92179072962.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3b9cd9f59741bcd90e43348b594df435/darovuvifitunuw.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/72769671954.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92a2a1c5---83399426383.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59cc53a359---2871943773.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f57fd8e3e0---68022094058.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fc9tkulo5ev6hc82l5fq35smpe/ripubizitarokosata.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/13750521336.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/tivunixumafagoxawidos.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c06ece8656---kozizobibivavojokugabit.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/9161522294.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=diagnostico+de+la+stps+pdfPDF 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_off0000bd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AC 16300 bytes
SHA-256: 4e27cecc00eaddd3571cdcb06ff6420d76679851bb9fa18d827ac3db70353d55
font_02_sfnt_off0000ffeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 10696 bytes
SHA-256: 09b02650dc8d7c95e32556c4c180acac111c93c7f5cc352240a4fb7fda6f7a78

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