Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcfe85b19f42727…

MALICIOUS

PDF

89.3 KB Created: 2021-09-20 20:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 534631cc154ff0d3fb4cfb0532774869 SHA-1: 5135431eccb0a875ff5bd6126c4cfd209c9649d6 SHA-256: bbcfe85b19f42727db50b68336a0cd820575df114600596265173c645e5395f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URIs and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://chcial.ru/uplcv?utm_term=numpad+letter+codes
    • http://goddesshair.net/upload/users/files/tokif.pdf
    • http://sm300159.agchost.com/userfiles/files/rutekivafatelepawejuk.pdf
    • https://tsolisp.com/files/file/zawalakanexanu.pdf
    • http://sciattella.net/images/file/tuxelof.pdf
    • http://ansing.nl/userfiles/file/neweko.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/gozonotipewivasosureva.pdf
    • http://matras-devison.com/upload/file/79968023554.pdf
    • http://akcompany.vn/uploads/userfiles/file/piwabititekikopulo.pdf
    • https://panelshock.com/userfiles/file/73172195349.pdf
    • https://easypayindia.in/userfiles/file/tilifa.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614600317b13e---jafunazekaraxepotokaz.pdf
    • https://dichvumayphoto.vn/webroot/img/files/16443413774.pdf
    • http://noithatmfc.com/media/ftp/file/gajuwemeziro.pdf
    • http://www.cenlafilm.com/siteuploads/editorimg/file/kedaxipitibudamiletu.pdf
    • https://copperscraphandlers.com/ckfinder/userfiles/files/77010678191.pdf
    • https://suprastoc.ro/userfiles/file/99090118115.pdf
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/tinuzubunuledapaduxugabe.pdf
    • https://djecijagarderoba.me/userfiles/file/zepatopexekavedemek.pdf
    • https://rimsball.com/ckfinder/userfiles/files/gagugapezufelojin.pdf
    • http://ylplj.com/ckfinder/userfiles/files/wubobukufutiziwotez.pdf
    • https://investir-petroleo.pt/ckfinder/userfiles/files/dasisotosi.pdf
    • http://studiomanzetti.it/userfiles/files/mojunewufu.pdf
    • https://sakura-bashi.com/uploads/files/202109051300347236.pdf
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/vokokakixidip.pdf
    • https://ichibaninfotech.com/ckfinder/userfiles/files/setebazojolonawomatuzizob.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_off0000e793.bin
c878d6c70373c488f0a956322afab2a4a145acb72d6f8e6625535d86cf65a096		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 10556 bytes
font_01_sfnt_off0000ffaa.bin
622eeba377cd144343e7b6c6e804e7aa05634f1c40fd0b28750fb188201404f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 24480 bytes
font_02_sfnt_off00013fd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD9 16792 bytes

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