Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fc7012745da960…

MALICIOUS

PDF

85.6 KB Created: 2021-09-22 09:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02119df2480022c9f9a5eb5bec484f0a SHA-1: fc4c5928792051d337d4d1d1e26655fd89458f18 SHA-256: 54fc7012745da960ccf6cfae2a4b2ae3a54cbe7320e9f5a805e6ccc3996e6ac4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics confirms the primary attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://cructi.ru/uplcv?utm_term=mario+party+3+rom
    • http://goopenapp.com/uploads/files/tinajaruvexifama.pdf
    • http://salsainkonstanz.de/media/files/repijofeserefebovogitowuk.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a167a4b2fb---92535966507.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/poc3e2dme8j6n20s4nk8neqb80/16036173922.pdf
    • http://apothepharma.com/upload/files/fefatoji.pdf
    • http://otohondamientay.com/upload/files/50802203593.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/3346168580.pdf
    • https://preprodpcb.com/userfiles/files/tejowujudebimisodol.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ac92bc8015---rutojeximu.pdf
    • https://textmakareknutsson.se/upload/image/2422376670.pdf
    • http://mkpstroitel.ru/upload/files/sojeduxobewegisobokop.pdf
    • http://madiagranitosilano.it/userfiles/files/89160511883.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/516df0b362c0618ead33db6f0afc800d/68334581684.pdf
    • https://mariellatriolo.it/public/file/ganobidunasu.pdf
    • https://alnahamgroup.com/userfiles/file/vawoturuminusotuvavapapum.pdf
    • https://blgjad.com/upload/files/tiwopikubajuvomi.pdf
    • http://apart1day.ru/file/jodipevabudaviwibi.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613455bbf0cf0---26207969999.pdf
    • http://madmojo.com/fckupload/file/99840769287.pdf
    • https://eownauto.com/uploadpic/files/ruxum.pdf
    • http://alvit-bk.ru/userfiles/file/87128337323.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/45344893999.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd1.bin
3e0416450741f82b24f24281b0341e4f6b957d8cc8e4cc601cb64d0c85a8ff34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 10244 bytes
font_01_sfnt_off000104e0.bin
210a320a70d00db5be44dd58f4e4772ab43e4bb9d30dfa70b27c12f3f7aa53b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 16532 bytes
font_02_sfnt_off00012f7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 16792 bytes

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