Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6c7645629fde17…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 19:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cc6e3911ab33f88ca86b610d1bdcb0a SHA-1: 5cad2d65845713a2a515dcb0cb625d260bb307f2 SHA-256: 0c6c7645629fde171ec95c648e437ec7e1ffbbc06b9702c16957f82e3d486600
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to PDF files on potentially disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier also provided a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vo23.ru/upload/file/46181678997.pdf In PDF document text
    • http://powerfalcon.net/uppic/files/81422068326.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77739961960.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/rolijodetitafaxumev.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614324c08d9f3---fewidojafiloguwikipoza.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/wiviwasubaraxevuwuxi.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/24179622000.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/39478617521.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/2cb7b53ee5461decbe03b003d93c7b4b/bowamopibi.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/fodabise.pdfIn PDF document text
    • http://toonesk.com/upload/39478941689.pdfIn PDF document text
    • http://eluvial.com/sites/all/sites/eluvial.com/files/lesixupasebesegotipejot.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/15414906009.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210906215216.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/12834028408.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/45743756310.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/wixujaba.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/joxonowixofer.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/xotemugerivomakanigo.pdfIn PDF document text
    • http://khlongtoei-nfe.com/library/userfiles/file/97797766452.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/88906955557.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/74330840975.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=minecraft+pc+free+download+apkPDF 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_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 10616 bytes
SHA-256: 53bd5f121f11aa111a29f144e993314980122970a8072baff8d2ab0455d7aebd
font_01_sfnt_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 18340 bytes
SHA-256: 86b798e4b4f34a57d879754636a76effe1ec29b67a37e2304e31ca5bab188132

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