Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e7148537d37140…

MALICIOUS

PDF

90.8 KB Created: 2021-08-21 23:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 62d5b97c3825a6738ab3f0fc50c54fa0 SHA-1: bd18fdc29ab41899bc65255f0da52b3237e63daf SHA-256: 59e7148537d371401918af73b4c0bf8a5b1372451f4cef229285460a6d59d65d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ck-kutnahora.cz/gais/image/file/98828248305.pdf In PDF document text
    • http://wittzumstegfamilyreunion.com/clients/e/e5/e56c03c63d8c9260b12fda9e5e6a3df6/File/sufib.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/27232284737.pdfIn PDF document text
    • http://614move.com/clients/4890/File/8159823954.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/e18p7h6q8il25as6662uqnd9pm/getisipevovotavela.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d985f6fc14---zibon.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160700a4c1a1ca---rutugizi.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/dd9c0f4249caa377b04d1e2a3a5632ff/56624268775.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b38a1b78d04998a3fe12d0edb4038033/1069483126.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/fapapovitufakifokuwi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee694e080a---61669993235.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/46639949025.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161198d666a30c---denupe.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/tijapiwodazazopewovexefak.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/nisafifotexewib.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d263ae2f11---nezukegiginizev.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/rositewufuvuxepiliridud.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/sajivaja.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/srve006vkdh8hdv7a6gk123bb4/mezulefipajuf.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fdba2f50---wefelotebazazas.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021071321153770554.pdfIn PDF document text
    • http://1976ahhs.com/clients/32223/File/ditenuxinetije.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/dipovesonakijiduzupiwug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cbse+class+12+biology+ecosystem+important+questionsPDF 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_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 11420 bytes
SHA-256: 68c6ce913f20f04f13f697aa757cc61700d530d6ca5fb9f99fdbe288d508af39
font_01_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 16856 bytes
SHA-256: ea0f5561a50fe2e4b7158c7b304dcf6e5631cd9e981b571ac5f65c7d7bd955bb
font_02_sfnt_off000143d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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