Malicious PDF — malware analysis report

Static analysis result for SHA-256 439faa8c8b227c18…

MALICIOUS

PDF

81.2 KB Created: 2021-09-13 09:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bbaf1c861bfb4d489d1eb7555bf24c7 SHA-1: ee4acbe78a93daac3dbe0ad80a2121078e5b8252 SHA-256: 439faa8c8b227c18c5f3efd15d73d274aabd32fba2894a6e5a76ebf23f80ae7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including a link farm, suggests a phishing or social engineering attempt to trick users into visiting potentially harmful sites. The URL containing 'download garry's mod for android' indicates a lure for a game download, which is a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://orsini-blasioli.it/userfiles/files/boruveninipulidijunososu.pdf
    • http://ourdesign.hk/ckfinder/userfiles/files/29859795907.pdf
    • http://novafish.it/userfiles/files/duvukuzuramopulaxoji.pdf
    • http://metafelix.it/userfiles/files/lobanawawodog.pdf
    • https://vpmemorial.net/images/file/defoxirixegofovipesukot.pdf
    • http://moretonassets.net/userfiles/84757714434.pdf
    • http://hadt.vn/upload/files/lawopojozoxapanunewu.pdf
    • http://aldobini.it/userfiles/files/47014774915.pdf
    • https://psihodesk.ro/ckfinder/userfiles/files/99552786865.pdf
    • http://moscowfashion.net/content/xuploadimages/file/rowirivumabopusizas.pdf
    • http://safiorida.dk/operatori/userfiles/file/40818726064.pdf
    • http://imhyuk.com/imhyukeditor/userfile/file/lomibowimo.pdf
    • http://progfin.pl/userfiles/file/girofojom.pdf
    • https://kuzeyilac.com/resimler/files/90556654386.pdf
    • http://pixel-pro.ru/upload/file/batovisajomuwutovusam.pdf
    • https://cartolmania.it/file/51728995744.pdf
    • http://feuerwehrobrigheim.de/upload/files/16269861960.pdf
    • http://ottotech.center/userfiles/file/96108985398.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132748a3f781---vuzudijesasuwobure.pdf
    • https://funcarele.com/ckfinder/userfiles/files/dixeberevel.pdf
    • http://studiotecnicoarduini.eu/userfiles/files/simipekenonopuzokunubade.pdf
    • http://an-ocn.ru/ckfinder/userfiles/files/pexevitarudi.pdf
    • http://scales-center.com/shop/fck_file/file/37414805802.pdf
    • http://rmgoals.com/userfiles/files/sufosugikixo.pdf
    • https://serwisnawigacji.pl/userfiles/file/16394410464.pdf
    • https://kiaavcilar.com/upload/ckfinder/files/60860156697.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6d5d611944998f480a81a3db0138d8e6/38235163469.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+garry%27s+mod+for+android
    • 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_off0000cd76.bin
d49baf4e9339a367e7608d1ec3f174ac265519e84bd88bd626cc1e0e75bad8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD76 21280 bytes
font_01_sfnt_off000105d2.bin
9f50723aa72cf6c2edbee14f137e598fd7f6021a1f1e5d1df9f2d77d3ea948ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D2 10700 bytes
font_02_sfnt_off00011e2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 16792 bytes

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