Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5be6daa98ad714…

MALICIOUS

PDF

84.1 KB Created: 2021-08-09 07:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: dc726c3d9359eb51341a33ece0475faa SHA-1: a1f82fe17223b1a256c94625ebe10c024c6030df SHA-256: 0f5be6daa98ad714eb41399980d8b6f368cfaf789b1ef97f4ee05e68effc8d5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://wastran.ru/uplcv?utm_term=series-parallel+circuit+worksheet+%231+answer+key PDF link annotation
    • http://agro-partner.com/Image/files/79703558051.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/kopova.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609876e3b89da---94992036396.pdfIn PDF document text
    • http://modero.vn/upload/files/lukusanopopoxudunamubaz.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fc15977a8b535681fb2aedc1b7f95dd0/53054845850.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2eccc4e8---72135748130.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/3774188072.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ppjprl09di5t7od7n5eudv9ka0/58868932483.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/petuwogebago.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/60842711782.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8e29e0275---29066404801.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/zimufudelinojoni.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/telanuvas.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c734b471ffc---dunomuz.pdfIn PDF document text
    • http://groupkaishan.com/d/files/24966438605.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f72f8596aeb---14748929172.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/jukujugub.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/034db604de384c5c53b20ce6892fec8c/wojegeduxujitigobaga.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608155337fcf5---zaboboketilibotutem.pdfIn PDF document text
    • https://manenshop.com/upload/files/92803166356.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/37547200455.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/e1fec814e5aa4e2b092d28cf2275291f/17943390574.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/bubepusofegibudosamerefa.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_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 10756 bytes
SHA-256: eb7f53f875578fb4ceb8f4dfc8fcc02ef2a7885c33c7338dc27a31f30b14d61b
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 16012 bytes
SHA-256: 1f097fe3dea29f2142e753631180924744f55d5e56bdada4ca4efe8752bdafa6

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