Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce2d98aea5236e5…

MALICIOUS

PDF

88.4 KB Created: 2021-09-05 16:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea17eb51fb4e9ae4a0c247f044e3d05e SHA-1: 52a12dad61cdf44547c29ff265922fc0c08c9d09 SHA-256: cce2d98aea5236e534ec7bd4b4c6ffd7bfc809dd1f83ca33ec4333036d86cc3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farm heuristics strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://lamelove-zakryti.cz/userfiles/file/xuvaweref.pdf In PDF document text
    • http://mayinmaunhat.com/upload/files/gixerivulilutege.pdfIn PDF document text
    • http://health-bridge.in/upload/file/disapitekukonaguva.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/fapurujano.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/40616955551.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f945625416550e14588f65b07b03174e/faripobezijonijoj.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/kibujibivagudusoju.pdfIn PDF document text
    • http://tochalco.com/uploads/files/wuleviwemakarobanobewa.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/d4f9361281902d97f3a8487828fd813b/bebedokinirufupif.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/66530042795.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/8nbj31cdgbjotkhg4gn9idqs8j/kusupamidafuzamovumipe.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/28702059927.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/77369846468.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/sesalusupiwelemolu.pdfIn PDF document text
    • https://service-panev.com/userfiles/fiworukis.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/nmanlk27k213lip95ffkpv080i/mizedadoj.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094557960547---laxadofidipuxabe.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/wosuminekogoxopujulu.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/n439l7t13sn6hilr17tjmu6ph0/95561396781.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/43214bfa90c7897ba5ddaa60bb15c949/nevugojupoj.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/98o9k2elepqi4p9ili6ppnoh9p/56008737924.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/ovpcobcdq9llfqp96dvuume4e0/74002305751.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/29292172086.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/kilejuxagolulujusunuz.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/p09p99a3jqnavfg6h8lbvnn0m0/58582969952.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/35685288692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=world+war+2+textbook+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_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 10660 bytes
SHA-256: 8ec2ce745fe642acf3103596299239fc4b8fc071302b0aa549c1f4b0e04140f9
font_01_sfnt_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 17428 bytes
SHA-256: 1cf7b89ab39d3da7dca5d1bccbfc0bcbf1fc056cb880b9a6b79888621db333bf
font_02_sfnt_off00013ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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