Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7047f67205d619b…

MALICIOUS

PDF

85.8 KB Created: 2021-07-06 09:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d190e5403c55c810a039a0fa505489ee SHA-1: 87ab43af1b72ba7eeedcec322cbc5e740e541309 SHA-256: e7047f67205d619b224cce7c680e20a16f63e3c7454edee1f47a528498248d56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=homemade+lip+balm+for+chapped+lips PDF link annotation
    • http://aostavet.it/userfiles/files/xuxeguna.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88cd90b7e---35125392389.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cca7b2f84---kebuk.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/wekekelev.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/30745274328.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c864c636a9---litovitefajolulesinufevi.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/82247791610.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/8uj2nbtoo4m16rguolkd5f4qgm/jubazulapefupitalovofus.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/737e3310aa08b3fd9e1572342a21b867/rowadokaxopaxiroxe.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/23282684128.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/bb3420f2eef2b933f88c19a030fd125c/17167543349.pdfIn PDF document text
    • http://aweibel.com/Photo/file/sexeb.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/gipagifopati.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607125f618cdd---29467575804.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9772959d13---68877881842.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/daleluwi.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/79180622162.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fa2e3789796c5f06a98952d6a3d43fa4/1918374427.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c241d7d6f---xilefoj.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/97nnfk3bsp8jq7g6e1oq8ctu21/14806312978.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021062901582370554.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tupefexogem.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/vodilowirukajiledezotadog.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/dujuriw.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/40226665563.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_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 10812 bytes
SHA-256: 63bce7564ac416af16e1b13b2ef6e04709db247a68c133436d519be5aadab57f
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 17156 bytes
SHA-256: 784b533d9057aa796bc0bec10f664df665531e6746ca4ebdd9c308745b9750a8
font_02_sfnt_off000131a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1