Malicious PDF — malware analysis report

Static analysis result for SHA-256 150be488ad5fe5b2…

MALICIOUS

PDF

95.6 KB Created: 2021-07-02 04:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f94e1e2eb8fb004f739df1b1fd65932 SHA-1: 771c5ba09c544ac5f08734c3770b989472b51bab SHA-256: 150be488ad5fe5b226057684384b92929915475ed835ace42d01084ed7b93f87
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body was unreadable, but the heuristics and URLs suggest a tactic of luring users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://parbatsamajjapan.com/img/files/files/miwepoduvezud.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ad73c4527---33810341686.pdf
    • https://aulacvn.com/upload/fck/file/80315849521.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/c446fa3196f35dc4611b059a0034099b/jitugijatewumoxuwolu.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7595f876---wexubu.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/91017640635.pdf
    • http://magicdiscoradio.hu/userfiles/file/mupoku.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/9tce25h9dj9rj0scag7nfqiapv/26227879636.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/95b9edb35e75036c6222f84579a1c734/vezutukemokapemevad.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0e2e55aea---nazakonofowobupokajeg.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3823c6ecec---58197943779.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcedf4e47e---betuxorogozujafireveb.pdf
    • http://tapestry.cz/images/file/files/gazivojero.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fc41a0225---rovemojugev.pdf
    • http://robalton.es/Albums/images/file///likirejoluxat.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/1fa1170dc1a78def3de6778e2ee27557/39875721061.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a736ef3f481---46832486290.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/46a5b00206b967f7983dd049031bbac4/banuvi.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/007c13d32f3209f682315451594e3cfb/busakapiwej.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b644383fd---kewimofefokaz.pdf
    • https://menu2uplus.com/images/file/selukijetuwogezemof.pdf
    • https://gulfsupremesa.com/ckfinder/userfiles/files/zizotuxumema.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad014e1b5e4---40216401154.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/dvb8ovk5engq3plt35o8b0kscm/zepemusawugorarakalalow.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c88768ccc69---tinikofafusi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=easy+way+to+play+bm+chord
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfa.bin
51160f404b2e8dbd67050ad95032a320d44dd1959d7686e0189e1ac7166c958a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10772 bytes
font_01_sfnt_off000115a2.bin
f9a69110b4ac0c338c1989c10168057008882d2879904ddd26e4989887a555dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 17372 bytes
font_02_sfnt_off0001433c.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1433C 16140 bytes
font_03_sfnt_off000158b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158B8 16792 bytes

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