Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0eddb26555dadd…

MALICIOUS

PDF

67.7 KB Created: 2021-09-24 14:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03f24288f1755b3187612712bf15f0ae SHA-1: 00d93c21d6b0efa99b63031d41a73bfb72ed1e89 SHA-256: ee0eddb26555daddc1040fe70d70e25e8731304260c13341f078170368d6857b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm on disposable hosting, with many external URIs pointing to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the numerous linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=how+do+i+bypass+android+lock+screen PDF link annotation
    • https://eobliecky.sk/userfiles/file/79561497864.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/8225843557.pdfIn PDF document text
    • http://castel.lu/userfiles/files/4412543861.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/xekakowivarozes.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/topuwoworimisegapagexuwut.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/pefezodibidilesowo.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/97955316276.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/36484860011.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/15956069195.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/filevosidemelewopumir.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/h8iefuct6mml48tsrm87oc18o5/lozibexaxawaziwaragowinu.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/46874253269.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210920111133.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/jozofibuzolojafov.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/30853709438.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/favewopilolotewazixaviraj.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/76351441433.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/55026876492.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/17025201368.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/55187865323.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/nafupu.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/9744987631.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_off0000ab33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB33 14912 bytes
SHA-256: 9ac35e972f54518379d6f6213a518edc925c5d5125d951fdca36c1006eb8a387
font_01_sfnt_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 10832 bytes
SHA-256: a10fae8333f4c039a5b0b80c02da29db06f602b2b49eeddc45a3a4e5236c41f8
font_02_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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