Malicious PDF — malware analysis report

Static analysis result for SHA-256 2638ad0221fc310b…

MALICIOUS

PDF

94.5 KB Created: 2021-06-26 05:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9c0c79bed8fdcaa6cefa3c7d19a6a006 SHA-1: e9013c1629ae5b0532e25d5cfffff3148b404741 SHA-256: 2638ad0221fc310b58bebed45685e8ba87c23266b40e73db41e4a1b29f7364ee
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to various websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest an attempt to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a593495eb7e---gujulobamometovarezoli.pdf In PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ee5c24526---subatubajosujaregulipi.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/dopidigezazega.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/vobodalexewuvu.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/sejopuvuviwopufadape.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce819be7913---41657707425.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/69884730551.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/50467110560.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c85364008---68483142211.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/gajel.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/29098946447.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d9d8999a82151d4ad2b5d055daf52f30/89168461136.pdfIn PDF document text
    • http://hookmyweddingup.net/clients/73542/File/dezedesojasodakatisapib.pdfIn PDF document text
    • https://motacademy.it/file/13527258798.pdfIn PDF document text
    • https://123natura.com/stockages/files/lulanamuteru.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754a247ec9a---92106726591.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d25629e8f7c---befinajifevodanitek.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/85de80849061ae99d1044c83ee91fe67/8760089142.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607adafc5def4---xapesexam.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/74165915172.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd88b65c3416ed59151fab5e4585cb1b/pepemukalejapoxunokixi.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210616010338_99netc.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609047fce3e85---rotujavogizivosakixeviloz.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f971242d6f4232b4e5caf2656859a9bf/97104260465.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/xumetoduranekegagek.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f286cad80---mezup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=discord+bot+schedule+eventsPDF link annotation
    • https://@sentry.io/In 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_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 10612 bytes
SHA-256: dd2eb94d8a408a0b416994d3776811f4ab9310baef1f5d256323c75319aca00b
font_01_sfnt_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 18428 bytes
SHA-256: 1662a4bb85a537a6e02c5eb366b062e011008ee15f3e4ecd01a36535bb63ee4c
font_03_sfnt_off00015454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15454 16276 bytes
SHA-256: e3c73a8b424e2a09c0d790c134906d9176457d6fdd0faf31195c19cfd3362ddb

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