Malicious PDF — malware analysis report

Static analysis result for SHA-256 091f80a44b73d018…

MALICIOUS

PDF

103.1 KB Created: 2021-09-01 20:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 75e1b80fb7705f47be23bc51f628d4d0 SHA-1: 909d5692acb61441130d8fc91be89fc68385a26b SHA-256: 091f80a44b73d0182082b06b30d2318f0695e2737a2e0d7995636457ac68bad8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://cructi.ru/uplcv?utm_term=classic+mage+best+in+slot PDF link annotation
    • http://flexa.cz/docs/file/86443684635.pdfIn PDF document text
    • http://uchid.com/uploads/file/978330501.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1596e8c63e910a5208fd316e907857ee/81484675534.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/jemido.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/0086058641abd2643f6bbcd97a327c97/49653317576.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/7a17471e3fbd1d7fc39adfa55b99885a/98200652797.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/22f2b6ed7b637a0a10d46ff86ccdabf1/zilogoxegazom.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/tugiwurixaned.pdfIn PDF document text
    • https://termoformat.md/img/files/69140710805.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16103e20064965---19314517765.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fb27568a1eb81f3337c84e0b692c68f4/19258004493.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/68582716218.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/pu2pm2r017ceg0k1bkd867q7b0/59556059117.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607a072c5c7a6---83639194351.pdfIn PDF document text
    • http://redactron.com/userfiles/file/48060875749.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/4353438886.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/45905155693.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/wamojuderetejotixeguxi.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612a2a0f20af2---32943590588.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/86097873350.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be835853347---96438579872.pdfIn PDF document text
    • http://bigredclassof1960.com/clients/879476/File/tepowenefalemibo.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14baa2fbe---xuzagerexilik.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/lodenabofebidupudumudu.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_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 19968 bytes
SHA-256: 10079ad0748a159a11691ade7cbed85a62c21e021ecc05602647862b536a9b2d
font_01_sfnt_off00015e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E06 10644 bytes
SHA-256: 9f3e91d7a0e608e2f3368d0e6d9ebcf723b79997a61964053e52d79db3e75e54
font_02_sfnt_off0001766c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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