Malicious PDF — malware analysis report

Static analysis result for SHA-256 464c9dd347d2977e…

MALICIOUS

PDF

86.5 KB Created: 2021-07-15 13:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cd8aba39d0b822de2633503fe37f240c SHA-1: 981a2042788b8affe1a307ebcccf4a5e5b7bb60a SHA-256: 464c9dd347d2977e22ee0204fbe552109e84a29215eb4412a7b339170997fcba
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous URLs, many hosted on compromised sites, strongly supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/33b3081c8d4a063db11b9463a882b89d/55690966597.pdf In PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33df58ef1---medukivi.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/41ca072eb196950c5f719cde103d0aa4/busobefoxopagukoluwa.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2783b6ee1739dd7c09f9b897ed7f2d5e/pilofojenonijelaru.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/29bead2c76a754b9cb1ea05012ff8fd1/debufisadazatel.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/16055080789.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0dcc0df3f9e1df638ca3ff381402ae81/79129783991.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/2fc8117f89f0e04fa917fcef0b585328/wogisemuxezeduvekazog.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/55446207073.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/9696841227.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/vulexivolu.pdfIn PDF document text
    • https://kultmotor.hu/images/files/34467433391.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/itkhdgpg5ldr28r8v5ttnnq9s0/63417645212.pdfIn PDF document text
    • http://rentaruedas.com/files/others/58758624835.pdfIn PDF document text
    • https://artbynela.com/uploads/file/17388055933.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/bujurifumavuxuj.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/kemegika.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jsjlc4vedah6jkk973germtkii/kotafowelunememed.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2a0f6463548cd4dec86ee549a923448b/lodevuwutowidukitafowetem.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58173580553.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/86276841884.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/s9nr2atjgkq9p3l7pkpri6c587/74349540301.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/pusarapagebajobu.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d100cb966---56699286964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+long+can+chicken+stay+in+the+fridge+rawPDF 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_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 11040 bytes
SHA-256: b76414089b2ce0846fde5f9b57bbb233296410bbf1077d8b1ca092ab99a06457
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 18352 bytes
SHA-256: ef116037b28e5e79c3b6c9c039064f2d67ea496d80c581f543c58f289dfca1f4