Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbe25aeb72fc958…

MALICIOUS

PDF

130.2 KB Created: 2021-06-27 22:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5f49aaf5ccfec0fdac81cf9d39575e7 SHA-1: 5039df1b6042d2a71d523db10c66fabc9e7d8cd8 SHA-256: bbbe25aeb72fc9588e2a0faf8efafd887728cdc0840bf60a9813827be9c2ec9c
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7f23950e---giguxadabufo.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c385f29146---41584453694.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b69bb6cf5---68604759018.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/u7pciehj0ltt610gfjilloinh2/vomepojokavugenitis.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d0d548ebf---sulaliz.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee3399bae3---31142698902.pdf
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/61871917064.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d526b853f---sivodalesele.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc00769d2---87650462125.pdf
    • http://alexhofford.com/temp/files/file/60635541441.pdf
    • http://abwcoliseum.com/uploads/files/zaruzabisilakekarepise.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/f88s240vhpmku9qmjlh7bnfr2g/10955247210.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160869b8a6bf69---xuwosajob.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e7a13420e5cc6e85111f6ba5b6b91709/jazosip.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd9e9ca85d---76475142277.pdf
    • http://spamsmsgiare.com/media/ftp/file/xuruvosarikixuzo.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce2a661fde---xiwepepinoj.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/rsrnia0sn9s69rmq7llhu8tngs/79876376887.pdf
    • http://ankaser.com/userfiles/file/bokegexotarurozuni.pdf
    • https://balbok.net/admin/ckfinder/userfiles/files/fulowitolozifo.pdf
    • http://www.valathors.com/ckfinder/userfiles/files/danutuwotaferox.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/qa5kq8n59siutj8sh6gtqb3gtn/38588476240.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/0405332586d50b1868a901921f3296de/tutofofosubewujor.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e549b753c---73479834951.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+unblock+unknown+calls+on+iphone
    • 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_off000186f7.bin
09ceec95ef6b99bed529673a9ae186952aa7f2e396f139858e00fe746a6aec34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186F7 16748 bytes
font_01_sfnt_off0001b2ad.bin
7e153b6c328e1fb3e02ca641b1c7abbabe96e4b8ce1464b308c0910644b6ebe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2AD 10780 bytes
font_02_sfnt_off0001cb48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB48 16792 bytes
font_03_sfnt_off0001e359.bin
0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E359 16448 bytes

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