Malicious PDF — malware analysis report

Static analysis result for SHA-256 7265829ede37e453…

MALICIOUS

PDF

94.3 KB Created: 2021-09-20 02:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b9e0ec042c7b94a9df07e278f7485bad SHA-1: 7f05c1d0fafb0587d4dbb8d0b5dcdcd8a95fce46 SHA-256: 7265829ede37e453d7933df497df86624f903e8c0eece622a7d574b456b96c28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The document's structure and the presence of multiple links suggest it functions as a link farm, designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://laborke.ru/uplcv?utm_term=kannada+full+movie PDF link annotation
    • http://toanthinh.vn/webroot/img/files/duredopabepixuvafasa.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/xotixipedon.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613af59441c3a---28343097011.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/vimuxudovegaxepemewilafes.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/riwafomu.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/pajozavedulepexidigabi.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/38681154211.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/foroxitivitag.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61257882840.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/8391430287.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/badawewatisixavi.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/14619042757.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393682de823---78256727078.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/pozusomojagak.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/beduxujejujekiwururiru.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138ebd965b9c---tifevisinakisamitar.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/zibogopajota.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/lifosibitupobezavepabiti.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/84529975190.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/jumegivulezusi.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/gobilurovodixunopivolaji.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/fofosixonigekowukutefopi.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_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 10308 bytes
SHA-256: 2c4d5866668d13cec6f97155d50c1f95e13d45f9a65dc652d980c435d5702b44
font_01_sfnt_off0001269b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 17500 bytes
SHA-256: 73de9d56aebb64ccb9dc56d2635ca7337fc2c4ae46292cdba5d5fafbda1c8af1