Malicious PDF — malware analysis report

Static analysis result for SHA-256 043a171d5b6b0261…

MALICIOUS

PDF

85.8 KB Created: 2021-07-05 19:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4f76c16be7c998fe7290fb9da2cb5070 SHA-1: 856191719a11a819dad85a64fa97b9dc9d45e4bc SHA-256: 043a171d5b6b0261e31d196dd93bcba673a3d045e3668fccc8b119f2e6f8b5f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads 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 delivery. Although no scripts were explicitly extracted, the nature of the URLs and the 'link farm' heuristics point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=pyramid+guide+activity PDF link annotation
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/b8814876d29232f68b03503aa49ed3ec/kuvigomixuwo.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43ea775a5f---tagedalemud.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/tixosizuxipufamelirarag.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/2e918b352d7486c65aa7ec9b9db756dc/76890901621.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/47548155806.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/93898116625.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dcg6p39ui7a905oejptlv7lrdv/14833858874.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfa5659d8---folivemebamosowodorot.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/104712d44509aafcfdc1af6f98cc1eb5/76602618568.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/52023678312.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/5fb1e36e54ca4c6e8ddd5135b471d086/zuzodidanavax.pdfIn PDF document text
    • http://web68s.com/upload/files/36361027548.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/74830977386.pdfIn PDF document text
    • https://schmitz.cz/res/file/molef.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f79d746de0fc9670c230a878e9a05549/74486483274.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/11205380564.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/2ce977e3edce419022578d73ca393e82/84773180536.pdfIn PDF document text
    • http://yilip.net/userData/board/file/82370223609.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b134438d---panemixexunevesumoj.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cadbe2865d9---27293942929.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/444dee20409f5d0ad7d582ee03fd4c0a/zazox.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/76706906161.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/levijitixepalu.pdfIn PDF document text
    • http://allasclub.com/campannas/file/biwopemofipupeligabe.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_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 10556 bytes
SHA-256: f43430706f15afe4b93b4618797d8b2c14276b3cab413d0417032c1aad20764e
font_01_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 16308 bytes
SHA-256: 3f76a91d8707cefdc335121086c8aef4e106dd087d7ba99872f824bd7b6d6a23

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