Malicious PDF — malware analysis report

Static analysis result for SHA-256 f793b446ccb69979…

MALICIOUS

PDF

77.5 KB Created: 2021-08-08 15:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2de0838e32f4e4076a26ddeaa8b54347 SHA-1: e5dbdd32387cd56dbd814b8e1a8a8b3ff0a3ba61 SHA-256: f793b446ccb69979cdb1184bc2268b3ab91505e5ad3c0cb57c2a81f022b919a2
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://vitalchurchesinstitute.com/files/file/53701287519.pdf In PDF document text
    • http://dent-pro.cz/pic/file/22978507489.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/373d492a11aba94cb21cea8fff42d311/luveni.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7f12b7c441a0de5eebbab974f1c9345e/neviduzalukojumevaputu.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/pirifomidefobasuwusik.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/ximedikikewufezumo.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ef7b8112f2c16900109304017251024c/91614632553.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/biduloguvuvuxatejotaso.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/8456510425.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b5a3fc05c8e55999eee14cb164a92079/52005797242.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798b635e951---34375079986.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/padez.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c02e34c41d7---43659860599.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076edccbf96a---27215002632.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7f7ddaf2f---rifotolux.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/foxanud.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/fiwitulewozavokomexelajal.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/iidrfkpr4jct8745464ib9ji9e/51957541439.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/tunuvexizavokifefeje.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16107ff8049828---14835447513.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/98310693577.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/sixafep.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/pobefepobazujivis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=antolog%C3%ADa+de+cuentos+mexicanos+pdfPDF 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_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 11108 bytes
SHA-256: 7472065bb4aad3f606830e7979f3f60329f43ca393d6ba6d02bbff27c4d4a17b
font_01_sfnt_off0000e105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE105 17328 bytes
SHA-256: 88acf15f8f58bc44c47a2c66729918c1f26d665037b9e59f9694b8580c7837a9
font_02_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.