Malicious PDF — malware analysis report

Static analysis result for SHA-256 9078887d1cb0019d…

MALICIOUS

PDF

87.3 KB Created: 2021-07-20 07:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01bc83cdd2c381254efa46e6a9dde04a SHA-1: b672fbd4154445598d435368151a9e8236d2a9bb SHA-256: 9078887d1cb0019d88fc3ece8a9523d212d158bbe42c8c5b782030299c2a55b2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to compromised WordPress sites and other disposable hosting, indicating an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing lures or direct malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1424

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://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/jaxejifibugatomifa.pdf In PDF document text
    • http://rahwayhigh.com/clients/42761/File/68143271654.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16074494607088---dipirajodilepa.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/l78cak8580laa38avc7k0jfb2o/kixewapiwadegatuwu.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b3c45d1055ff0cc9b167306add1c6f6d/lafotunewogigataduradif.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/bk0pao6pjko9otk1oev93fbv67/wefuzajug.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/kujetorokenapunefokagomen.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/4d8e75133b722a10c945bbfbeae64fdc/fodewosete.pdfIn PDF document text
    • https://motacademy.it/file/bazilaxetodusasovifezez.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6cef381ac---nibalabobobepasijo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b1ac0ec8f54fc6e4045773f820ce2476/jirelafupijezirewasoso.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/wejusunulod.pdfIn PDF document text
    • https://faceless.me/userfiles/files/sejarowofuka.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/wopijajuli.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c22ef9936e1---91027411914.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/zudazozexojod.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/28483774606.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d6ced3c1f2e1271d01eff20592cde2bf/vifug.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cf4f620245cd59dbb5fcdf954ba832da/22102453874.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/givuriwovivuk.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607467053762c---73311404366.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb57b74e3c---42844095953.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/nabijujupebil.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160754c4501719---vokod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=at+work+i+never+run+out+of+enthusiasm+meaningPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 16772 bytes
SHA-256: 04c8dadd231c2fd52604f8dc552e0acd1eed220be6b50b5232f7beeec1603f5b
font_01_sfnt_off00012716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2D 10940 bytes
SHA-256: 1989df6cc847948ff08709d94a2f7be31f9fd6416f5bda592758e54303b0078c

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