Malicious PDF — malware analysis report

Static analysis result for SHA-256 2053cc97ef258c2d…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 02:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 4e3b9fe6e3e1521307c4d11c39ad8834 SHA-1: 0cbbb90e586ae2595170fcef39cee6ad0176fd3c SHA-256: 2053cc97ef258c2d4e852c11a83e5d2152497b71ddbcfcf8b35214f49972d262
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/11e6c03994b79a5c60a02ce42c055c5b/fivevirinemudofilexuju.pdf In PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a5f63e97---wekatigobewepori.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f2d1fe050ac6def28d74778818c4c941/pomog.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/46124073647.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23fd1c7b4---7693353433.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210831045603.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/88453979594.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/disowulusufefegapukovigu.pdfIn PDF document text
    • http://sartor.ru/upload/files/bunejupasivobuvafumula.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210802120655.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c8c96d45de043537466c86c6661dc060/loxowitosofegigumuxosuke.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/84087604715.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/vovexodujuzuko.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kekugoje.pdfIn PDF document text
    • https://tigaintan.com/contents//files/47099331765.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/rabixogutugug.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/af3palmibpf3k5ar985ocd2c0v/nexurivinewasonafewipa.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/bivoxakitixowebisuna.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/89800278159.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/57938697284.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a8823552e12f3a5e50556777143fd2d2/kigudomi.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/52580ded954c57fb57544294f40e1dfb/wajatedovupaboresigav.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/4faj16cqg8884fh41p2p9svflc/76934252126.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/wepumifimemal.pdfIn PDF document text
    • http://emeat.ru/var/files/kejaxogominetavidit.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/fifososopilug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=soa+exam+fm+study+guide+pdfPDF 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_off0000dd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 18132 bytes
SHA-256: d4e3b998eddd1c5802f80b9727137dc8fe0451240092ffc2833c52768e1a4fb8
font_01_sfnt_off00010cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CF 10980 bytes
SHA-256: 4a422272645742b16e71d792d393d6038787d54e684d930648bb1e09214e141d

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