Malicious PDF — malware analysis report

Static analysis result for SHA-256 94161cf159296cd7…

MALICIOUS

PDF

182.2 KB Created: 2022-01-14 08:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 95086b73e0c043f4ada85db694f59390 SHA-1: 81364cdf60a95fb25505e967fc84376ee50bd6b7 SHA-256: 94161cf159296cd77e24e47e7951f1d6ea9406eaa4692103b7b8b9d4153afc98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate these redirects or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9609

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://progettocecinacuore.it/writable/public/userfiles/file/6709713311.pdf In PDF document text
    • https://xedulichhaiphong.vn/images/news/files/bovefuke.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/deketipejusudez.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/4741911161.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140842e60c7d---vamuxawesuvipepofaxe.pdfIn PDF document text
    • http://djpress.pl/Image/files/9077379902.pdfIn PDF document text
    • http://mauthietkedep.info/upload/files/74194322181.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16198d283df68c---59373966385.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/e57e8f570c79c6d08f04a90874ce4128/sirasubalema.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16161beceb01d9---37279006623.pdfIn PDF document text
    • http://freewest.at/23024275569.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pakivixonu.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/jotiva.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/lejeratikom.pdfIn PDF document text
    • http://www.korsun.ic.ck.ua/js/kcfinder/upload/files/zubilemalixudimis.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/18559449321.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/98568437334.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/renonubetivipojojona.pdfIn PDF document text
    • http://zenhowell.com/upload/file/rusam.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/34590445883.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/896FEnmJZlk/uplcv?utm_term=animotica+movie+maker+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00028049.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28049 17732 bytes
SHA-256: 67168ce898b57f7f2aaa3db7c0dea07d024937a6bd727f3c4011b390c03a9c66
font_00_sfnt_off00024bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24BF0 20008 bytes
SHA-256: e7c6a34da58e21449ed289bdc3aa97d9498ccd1a297b1a0f72c65e38fc1c8a1e
font_02_sfnt_off00029bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BC4 10420 bytes
SHA-256: 4c1b8e9bd93eaf1f1c43e4b77cb0e25bd28764e70304bbfc316ae1c874fb93f2
font_03_sfnt_off0002b371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B371 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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