Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72b152a427465d9…

MALICIOUS

PDF

91.0 KB Created: 2021-07-07 16:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3fb6cc0323a3734da5ada3677857218 SHA-1: b83d740cabe2cafa0cfda65f735e6ad68c9c0422 SHA-256: e72b152a427465d92ba48bd8f328916e508551fe373d5843e19b9df6b3a58799
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and numerous links to potentially compromised CMS upload directories strongly indicates malicious intent. The PDF likely attempts to lure users to these links, which could host phishing content or serve as a distribution point for further malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allnatureint.com/userfiles/file/11464955515.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608327878169b---fisutaleruwumawutasar.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/c3191d522c000fb333cfda53ecee83e5/pubatoliwexaxajox.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/3oer4tfjlp2io3n4sak94v6c33/42277776801.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/49511313165.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76b19ea7fa---temamagewemejexoxa.pdf
    • http://sdds.be/userfiles/file/50631220116.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/368cc3c8caa8735936020d93cea78342/kenajad.pdf
    • http://agapetown.net/ckfinder/userfiles/files/rodibelorelele.pdf
    • http://giadinhlaurenso.org/upload/files/33272961176.pdf
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/9859310320.pdf
    • https://birgatour.mn/js/ckfinder/userfiles/files/pakasevafadazibu.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/83e3d90c79e29621db73e491cf124ecd/netefeboxusewenanamalixub.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7b00c59c3---junototagater.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/pa1lff405lp52tbq8n9498gocn/dejat.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b5d681f6e121d2b80cd5a0e60f26fccf/baxinigosatezil.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1df77194---39468537005.pdf
    • https://szabobuszrendeles.hu/files/files/gawosunetota.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975c8d2bf09---gufofugulilutilofunaki.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf052a8a948---vugakimeravonufabaz.pdf
    • http://marcth.pl/media/fck/file/16054031887.pdf
    • https://alianzatours.com/imagenes/file/pakis.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/veremofadokafo.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/99d946306ef54502c90e3a4adcfdb87b/lubisaluboxinexagop.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/lr61u0f44j31sel02f2ufus74h/jepukedureran.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=iceberg+theory+in+literature
    • 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_off000100fb.bin
d2c751c2f73e27a336c0cb5a510536578e64803101e86f67fe50580c84c66cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 17872 bytes
font_01_sfnt_off00012e54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E54 16792 bytes
font_02_sfnt_off0001466b.bin
f378fd6dd047599ad06b36da3485d510e3932f19c89430820e0d2b002b68e919
pdf-font-stream PDF embedded font (sfnt) at offset 0x1466B 10644 bytes