Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b316bc61536a182…

MALICIOUS

PDF

78.6 KB Created: 2021-09-20 04:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e7e9bcecfc22c22f293ccafaaf4d5067 SHA-1: d9219699b5597f3a281157131280d28c72929d2e SHA-256: 4b316bc61536a18297bea48c4707be046b152346678829477118d1adab369378
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and links to compromised CMS uploads indicates a pattern of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://inwebjor.ru/uplcv?utm_term=fortnite+iphone+download PDF link annotation
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/pekegegalitus.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/palapisoragolerizefaza.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/47726885598.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/15508451076.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/5dba6f9bd950a2f9f976a536da5f6c2d/bileposez.pdfIn PDF document text
    • https://razredna-nastava.net/files/80465349266.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/33288465852.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/zudipa.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/natajaleduxawem.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/25692720798.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/giroxomoralamuzawop.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/02d7173319b23bb957b763a606a556c3/94386949705.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/zotewites.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/28426346976.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/forifojediwujatabapuxepi.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/48741037421.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/fupaxuxikimeporidofoba.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/74851609979.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/95a82704f0d6f468bb61aeb2faa09083/rojaginerojuwedu.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/besinotan.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/lckn0g4b35bjao9ov5f9a306v2/faginiwet.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mifagefaba.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/67578275203.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_off0000cd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD45 10384 bytes
SHA-256: e9237c0ce9def36387232fadc4d0b2d307f833ebefe3ba135a42b203937548e6
font_01_sfnt_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 18452 bytes
SHA-256: a64d595c0ec8636f2f0225a723b08aa06eb5d41ee0d06051d4fda8a34505ba95

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