Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f5c989286582d7…

MALICIOUS

PDF

92.8 KB Created: 2021-07-01 11:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 22a2117f8ca5c90b32ea6933307d538c SHA-1: 92398aa9a2519d0c382856e5d13f349637ccd8c3 SHA-256: 93f5c989286582d7c0b1bd50170958770ac9c2d8fbbfb07c5ef03bb8dbfac3c9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, forming a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://wastran.ru/uplcv?utm_term=criticism+of+psychodynamic+theory PDF link annotation
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607637c875c10---91545852266.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/19318864ed43662e3af83aa0b870a07a/xesokutuperutivagav.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30a195938---58635516960.pdfIn PDF document text
    • http://industra.sk/userfiles/file/2850989385.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856ff9eab82---xufozatazerufasevokoxogik.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b42e4f452---vilunopufofez.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071c4628bbc2---kulejumiruwiniganixoka.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/bofibog.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/jenozipomozotag.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/jazorugufinej.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/1hqephg3v0spdru1cjsujngois/31165740575.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/82656279145.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6627b072f6---42649915230.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/sitosubedut.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea46dff1e---22476506315.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7a893e38b---11356332022.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fefda6e3ab---ranukijosojelizun.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/ksqtgmvgq3s6vsv9jma5g3cktv/rijabudapaxobelogi.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/76533582711.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/605ecd0242dfa0e5dc6fb04c5391f1dc/79150700915.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/xuxobumofubopa.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/vo7gtjj6l2no7l8ap1aglb2eq6/39941704833.pdfIn PDF document text
    • 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_off00010410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 18020 bytes
SHA-256: 6f911bb1c079fc609722427e38e3c80097cf8079aa77fbbec9556440c91b50a3
font_01_sfnt_off000132c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADC 10984 bytes
SHA-256: 19620b5e0bacf5d0c147f1d1179146595fe6a6f1509bdadb98adb606a5700518

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