Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0d4e6b34295d63…

MALICIOUS

PDF

110.2 KB Created: 2021-06-27 10:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c1833a4c247d7b4e5d82e349eeae8edd SHA-1: 7eeada200b1fbdf0b853f0b62c642e04f2e65044 SHA-256: 9c0d4e6b34295d635fc8b56aa4729c6efb1dff5a0e050738f8dad4d302dfbfa2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://synerhu.ru/uplcv?utm_term=foot+patrol+meaning PDF link annotation
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c0001a2---xibiduworababanekoso.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff65b7da3---bibeno.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/4e7530e790ffb6801fbfbc9553020db4/pepujuvafarezuwivo.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/pagisatevalip.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/35952591095.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacb7c4046---24964768727.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/jenedegipun.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaef4f804---86009986326.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3f15dbd9---83629746664.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087de19c2cb5---15764900748.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/dcf61c697c6e517c52271e399627307f/22594449079.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9912adc9---63080392983.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5b472435ec812d9e96828955770cc404/96334932800.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/70949803009.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a309a4c915b---31527579929.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0a1bc75217243eb269058556e9462bf0/pagiwuwalifurinatilewajef.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/xegeretikodurebawonogugi.pdfIn PDF document text
    • https://new-baby.me/userfiles/file/52708702456.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608959bcb74d6---81284450404.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d9ce110c---joseta.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/kibojenadabaput.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c333ee05f37270c33cbe2b37184cdcd3/vexasepos.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/3obq6avmn723p3ehjitq4ljpvv/ginijebeminawemonifafem.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/31587422344.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 13044 bytes
SHA-256: 988e49acce99a87308f94badc454fe0f3b9cae2cd5c7de07ced74cde718a0668
font_01_sfnt_off00014d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7F 17440 bytes
SHA-256: cc910e24c02062d78b72875372d6c15bc4fecb88bb2f7dc0d1081dafb7b6a05c
font_02_sfnt_off00017b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000193a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A0 10404 bytes
SHA-256: 1d8f64ad32a5da884129837d03fcd0b09a0c630598b4d2ea58c459463c6d9c09

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