Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b0f96eab239514…

MALICIOUS

PDF

97.1 KB Created: 2021-07-01 21:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1fb9390055899748bb2fbfef0be9449e SHA-1: a381f83ef17e09cf6f58a656bed8406b0357a4fd SHA-256: 21b0f96eab239514abac9648b6ba4f61400093465fe229beff6481553949ee01
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://philabc.ru/uplcv?utm_term=thirsty+all+of+a+sudden PDF link annotation
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/74664294873.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160814834b26f7---56455477000.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/c63eca2c88eb9a49757105622ea240b4/3843127316.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/fuvibemipezikedodubalen.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/f5n7fps7k6tlfjrp1bunk7rq3f/wegokaxasekerodosinuvupon.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/74985428730.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210528_171812.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/06/file/202106290854063359.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/07927b475baa21cd9b9856c28b6f899a/kerunepipusatagovelikeg.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160788d2f8b703---dimoxabiludegago.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/6tabdaub1usgeshogd2s6gtuk0/toromuw.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609265113de16---82749027146.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///84838089832.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e5358fbb9---jaroxirevate.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/10305128228.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/13043460858.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c40fb89ef---76770562011.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9d15ab882e75cedd4ecc9c91c15d4dff/48995099927.pdfIn PDF document text
    • https://kildevangen.dk/files/23927131650.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/1033806689.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160858b17d6cdf---zoboxemowa.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/725f67e619235cffa58e6d6117f63678/28011304713.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/aaa4b083c88a04921ee0d66186f85424/fanoxupufakup.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/94baf344007b8f8d4b98bae02f862059/kagurilidagoranita.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a18fa8e255f---gokepefakimamesaletuk.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/patagajuguvazovofedagami.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/57629164641.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/41upqsvevtac33pbkds1agoidk/mibumegurot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11784 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 17880 bytes
SHA-256: dc713e319b7d61b7a4751635c7c639d486e3459a0b5e423dd173e5d0ccf0add0
font_02_sfnt_off00015eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB1 10628 bytes
SHA-256: efcb6bc73092724854d02a7d419c5cd829a9de5954b242a485f0eb16abb0fbb0

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