Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0feafbcb1b190a…

MALICIOUS

PDF

77.1 KB Created: 2021-09-09 01:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e9f05ddedff42d4fdec9a031343cbb8c SHA-1: fc0338dac40835c58d2756066b254606f0662b7d SHA-256: 7b0feafbcb1b190a42eadea1b5ec80af865fd09372024eeee82d55da6c9d74f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 URLs, many of which are hosted on disposable domains. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites for further exploitation, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laulumaja.fi/ckfinder/userfiles/files/85771904562.pdf In PDF document text
    • http://mt-filtration.com/uploaded/file/179109179761392bbe8fc9d.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/13228293812.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/rogubi.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/86914123800.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed6626e563---82952629056.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/18372999382.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/sewit.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210903_051310.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/58760578830.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/30452231581.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/39667396097.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/rugumuzuzinagepalo.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/50660532266.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313481482ea---89774289707.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///94932425062.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/35723031822.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/45356736107.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/27734296028.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/53289024466.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/zutudapexovuge.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/78333897699.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/7405941743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=rain+today+premium+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_off0000c94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94F 10692 bytes
SHA-256: e46bd67e3a6b141dcdbd61c39c375f5487640e7086045af96006839aa94ad191
font_01_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 17568 bytes
SHA-256: b074df15a3cb6610cfa851c6537aa0400b4e6adabd3fadb807fb4bfc520f6249
font_02_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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