Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7f364b8804f081…

MALICIOUS

PDF

112.4 KB Created: 2021-07-06 03:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3528d2de48b7c72f8c15b5130c5ca204 SHA-1: ee401e9ebaa124fd48b3095e7649b3aa4912dd16 SHA-256: ce7f364b8804f081292bf8517d1ac0a523d0f651ab20ee7f99317838096f0eb3
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised websites, many of which are hosted on WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, but the link farm structure is a clear indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/473af06b1d1eb713b787250df8577463/14773621933.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/228527426970fcd418df51ea376855c4/50808264237.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/601bce8c34197337f3ae4cd29b1f5b60/zesikepumusujogug.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ca665b880a8---66569972967.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/zugunebuludikezirozala.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4b1fa8a1170e78057b7ea92235081678/borutututudunuvisege.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/19840319373.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/ginuta.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/2ba75f415853ff64cb614d7b5a25f8b7/86413798638.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de021ed12a1---84541648214.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/wanuzibakupawideva.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088ce760f859---80233145247.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8248a4f2---24273407799.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///jalizefoli.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c851aab0b15---vipafobuzudevo.pdfIn PDF document text
    • http://flexicourse.cz/res/file/ramaxak.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b30116960d---vinoxugogeruluseriguva.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/fibixebekog.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/danevenunofagupazojone.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1b5142653f4c15b9938b3f5d15c48f7a/tejiwawetivogowedozabot.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/18637761479.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a31c9cac0---lagidubuxave.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/jevunit.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a32937bc---67869861181.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc6ced173---31129792063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+spiesPDF 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_off00015666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E7D 10284 bytes
SHA-256: 4fcf8fe76257cb4f6b8bf30cb59925a6f15ba8958e613714b8e18e426cb1c61f
font_02_sfnt_off000185bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185BD 17688 bytes
SHA-256: 33744cc96e4475a9cf9ed7814d4af0724b3e0b5d1e8373f9024d4153ab2b59b5