Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f58eb4f9c37123…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 03:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fb0e601215e8aea9d907626154feeb20 SHA-1: e5f595b92a26bfe68ecba16bbd82fb3df258e15a SHA-256: f0f58eb4f9c3712301ee134c98343b9c7aa7e9c7caf79e8d137e1bf5e5897881
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=rosemary+yellow+leaves PDF link annotation
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4ba177306132dde6efcd90159f4f2e11/37722363001.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/bc94e9854ad78d5d5c1ba908d6cd45c0/diluwexisapiponapidujemu.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c588c09776c---mijekinugunevu.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/dutumutoribadikojiru.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f962f1a53f030fffbc8c9ca118009c2c/zawejezuluveni.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740a328bf99---16824198105.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2c6700472b46aa959847acd290c337d9/fowakebovetis.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609a87f390d42---32999640078.pdfIn PDF document text
    • http://ge-mak.com/files/vaxopuvu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/zomekebogifegoda.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8baf99897b---92301277114.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758f09a05c0---vozixifobinewadivujekoxe.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/95e1d492239e4456876e0d85fd5c4f9b/17658183857.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/71749195881.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/sudotesavibepesu.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a016e8c523e---podisi.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/4f7bb7f7d456bbea34d1b6c72fddc000/tadididanuda.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/12dcb11466880baa2fef081e3808c992/rinetubodejomasusiga.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5b71694f2970086a298a82311a3feb4c/77958596208.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c705df553ce---tefor.pdfIn PDF document text
    • http://limoride.net/gallery/file/76128591076.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/vafanipabulafagaw.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/39ism39pdn0t11hio8hdgl1uvq/xumotipov.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/panoj.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/mis36gl2u583ibqkhnsrtcm64g/87837322402.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_off0000ef07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF07 16628 bytes
SHA-256: 6807f028db296ff54028d83499d4bf390b34b12876ae1fd2e1bf4fa37de0b16f
font_01_sfnt_off00011a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13260 10284 bytes
SHA-256: 2a9bc6fc30e22e20c77d825ae2bdc5f960ce5eb873364e62769708132a2071cd

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