Malicious PDF — malware analysis report

Static analysis result for SHA-256 85eb4cf3f3c7c7d9…

MALICIOUS

PDF

85.8 KB Created: 2021-09-03 00:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3fae470a59a17adbaa180167ec03cb89 SHA-1: 82f8196336d5a549d90c731a5f95661d73e77e05 SHA-256: 85eb4cf3f3c7c7d9ac10d67ea846059f9f17626a482778feec156624ba0cc091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://kampusogrenciyurdu.com/file/ziworukotofakudavut.pdf In PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1203fef019---jejobokava.pdfIn PDF document text
    • https://epiphanych.com/images/file/fazitaxufuxevajivuviteg.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/fulukalava.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/58907570857.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fd4cdaa01---12889002369.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1sbi5q9mkp4u1elhflhrs82j2m/98253830301.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852a7a1555c---52109046433.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/xikewazadazaxuxanulu.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/79792303024.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00bc74ce6c---kojoga.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160872229a9423---senudekak.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/tazepokomaguf.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a9f695b45---16093862991.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4f60df847---difoxuduvapuzoz.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1f0d60595---27576945753.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa077b4540c---13709311661.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/xipasojegatomu.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/murebiraxuxile.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc33dd80da---baludovilufiwijapo.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/71816161438.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/55085957417.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a1fba1fc---92390225489.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/digaluzubatovozalazavepub.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/panifapofozelikedap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=que+es+opinion+publica+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_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 19608 bytes
SHA-256: 3f52d7e14d5b8d6d0cb30118e4007e5cadda17b428d4eab013c2d96ea6a26cb4
font_01_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 10716 bytes
SHA-256: 77d618ee3766e68e34aeed1ffe1292895048120a92bbb74d858ee0499bb09442
font_02_sfnt_off00013146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13146 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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