Malicious PDF — malware analysis report

Static analysis result for SHA-256 4742b2ca902293e8…

MALICIOUS

PDF

95.8 KB Created: 2021-07-30 06:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 085267d87249382284b55c0d0afdfb4d SHA-1: b8de15d926e96cd744eef28614e949d31f8a03a1 SHA-256: 4742b2ca902293e878bb6839db696980c12b21d5890fee677563175aba2f3e22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or malware downloads. The presence of compromised CMS upload links and disposable hosting further indicates malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://agroadvanced.com/app/webroot/newsletters/editor/files/12934843920.pdf In PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/legedugaseji.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/836819dc3f06cdb10665420b2c9f918b/duvekanafokidi.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/87012724694.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/64602146c0d06760b931977233b677f0/remobarudijofevoxirewu.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/62659000482.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/55vmbfkdd7pk709fi8b8rp38vj/66644254763.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/21659997875.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/63863225289.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade4865897---sisudufepi.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/65887978360.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/wojadudewanokivejureb.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/grofvrsdb574o42mcgl67lvor2/70935643430.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/nowepivivunetabotokokak.pdfIn PDF document text
    • https://wagaskar.com/media/23443309606.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/noxojatej.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/19675463203.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160886b5e4818b---53384929648.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/18816483724.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/welatixi.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/65160377650.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/26760844702.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5daaecc441dca9568a747dccd1b01107/dozuzo.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1bd2a02e3---62706956030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=will+yennefer+know+if+you+sleep+with+keiraPDF 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_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 10840 bytes
SHA-256: 16aa597d2871d36f41abb094a6c805d7dfae6d94f1f0f3839e508a3051904744
font_01_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001411d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1411D 18240 bytes
SHA-256: e649fe181b63c78416adabfd32a6e3cd35e15b522483f6d812b5420859dbeb60