Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58e8d5d4c2c0ac2…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 23:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 42a61ad9fe0cc306089aa677c4e5f6ce SHA-1: 02d297e4cac4759efb1c4bacc73036a85ffee74e SHA-256: c58e8d5d4c2c0ac23ba342cabd25275e0eeb7e6dbf91205cf5e73771ae037e3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to malicious content.

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 https://drafthe.ru/uplcv?utm_term=harvest+thanksgiving+sermon+outline+pdf PDF link annotation
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9925f7a042---dikurupibaza.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eba8c96bcc---wudazifu.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4548b41522---90344280185.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/tobogeserazopapanujupi.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ebji2srphtb33g56qrt0j5o0i4/zowuk.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/d30cf8bc310bd3d22c8fdd91b16394ee/82742446086.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/17264341914.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/3057239143.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a2e71d30a354047e434f83be8b5490c5/zivuxuzapujelozupesigow.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/c93d4c33f782d818b318011946daa009/31658276271.pdfIn PDF document text
    • http://bougerpourstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/248076633.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/56950859209.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/d8b1357129806556885bf7b286057513/worimivaguwotepoz.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/pezokaxinaw.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/bulubeluvoxujenaka.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/44907317522.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/46d292b6d7a51ce4a78fd07087745b0e/68490385063.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/k9do4doq4ne965qoa3j5imt96c/75970199450.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/63598983093.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/wekafamufovubuluv.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/84225970190.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4420bea85a1e6ebbffc670cdeedcbf93/fikemifegesasudid.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d7933ba28135b43ea512933c5d1fece5/setusu.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/2ba7c2ab1ceb06d78d614e90e61183e3/jefapekela.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6p887m43lc9f0def7f11v9vja6/93315093845.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC370 11192 bytes
SHA-256: 64184b390dea4b8e0ee682b635cb4334ec11b392cc4a24549f9bbfff90f22163
font_01_sfnt_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 16684 bytes
SHA-256: cbeb125429d0d5c413da59605901440e2125086442987e7a7b7e1f58058630c3

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