Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7bcad0cb5b2c3b…

MALICIOUS

PDF

71.3 KB Created: 2021-06-28 05:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7af384ba53bc56873cffe0d97310a01b SHA-1: 9337cb44c7c698414cb9f81827dd9dfa085c752e SHA-256: cf7bcad0cb5b2c3b78c6a404d29ff2a2c5f7873f9799525dd6035b16775a84eb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which host other PDFs. The presence of compromised CMS upload links suggests a tactic to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bloomland.com/sites/bloomland.com/files/13510100067.pdf In PDF document text
    • http://aceonlinementors.com/userfiles/file/10315457930.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/qborusv7phub0tgt13365q9b05/feles.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/sofem.pdfIn PDF document text
    • http://dhf-china.com/d/files/21427368419.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095789d2c848---wazezekimulegijemereri.pdfIn PDF document text
    • http://changdahk.com/upload/76051603924.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qnk0qnf31udobmghqu23cr52us/fizaxenagokubazimerefofid.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/ded71b9bb62934c9b19b619e1b41debd/xokatifib.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/temonazufi.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/dab1506691b4516cb7346a784729a081/kajimena.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/73eff2a7fc2ca13d01430844b99edb2b/25330652481.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/87726824847.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/zuvirulalinimedupetison.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c51989e0c7e---dupawifoxes.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/ketojak.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/22923038576.pdfIn PDF document text
    • http://dnepropress.net/files/file/87380431527.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee3c9bbb3---vikivil.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ae07355e024fe2514a124c7b630e0989/xomekag.pdfIn PDF document text
    • https://luminex.pl/upload/file/femevubimikuje.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/lumenazodulelol.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b8ff234b51db226465a6cb3981a28b06/1099759381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=arithmetic+operators+in+c%23+with+examplePDF 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_off0000b608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB608 16204 bytes
SHA-256: a0f269c044b6dcf7fd4d4ce93daafc71af263c1abe2d37e80322b6201dabd591
font_01_sfnt_off0000e025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 10572 bytes
SHA-256: fa8d8717d4498da5cee1db3948cd3063317d8c4ef72e36a8f064df03ba854796
font_02_sfnt_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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