Malicious PDF — malware analysis report

Static analysis result for SHA-256 c294e5e4d12d7cda…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 06:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79634fff5ab43dbc56a479b01cf14c7b SHA-1: ce404e481af67617f8c62c91bc80ee486af50fb9 SHA-256: c294e5e4d12d7cdadc236fcfd5081d0d290b9151c2cc5f66507184ed1bd48176
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs hosted on compromised CMS upload directories. The document body is unreadable, but the presence of multiple links to potentially malicious sites suggests an attempt to redirect users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/fq1od2f2rjlb1tdqh7pe3bke25/86883120916.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/bitoropifik.pdf
    • http://mahlkoenig.nl/app/webroot/files/userfiles/files/nagowobofogatenukesivu.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ba9c5078d---nanazogizodozokuxebuwuba.pdf
    • http://coming-c.com/userfiles/file/86388999499.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/bl8jfina6ciracoq8b7j1h6t91/45092526496.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e90ba8308---81154308095.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4525c1542---37342951893.pdf
    • https://appfacile.it/file/kojuvagezi.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089e3a2bcb79---zakar.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2fu5ipfktoc9q77okdjse17tp1/19937140988.pdf
    • https://my-natural-style.net/upload/files/faxugetitumiximobe.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/3e4b9099e6a9d3894b49c5adf3ec73a5/xodisabikuwer.pdf
    • https://stallion-international.com/userfiles/file/wibodatunojifedazeki.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090cfbcc53df---57389783491.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210603002632.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3235438f4a4759d3d8ae92a7f0584f8e/42090040212.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607501b496f1e---19218263487.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/q2oop6t8qglc8lnfg40s69a2rl/31406968830.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b149e1a2f71---83411774140.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0101a97c75---24663838086.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5979f3c2a---58928061393.pdf
    • http://atya.eu/files/file/kizotobabefanuvofeniwib.pdf
    • https://muacash.com/webroot/img/files/91171996716.pdf
    • http://asustainable.com/global/file/romuwixurujuwemedobili.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=all+in+one+bechamel+sauce
    • 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_off0000eced.bin
c156fd083c3ccd2b859451f066b408ded16f2bb7298168682482e7b66c2de7c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 10516 bytes
font_01_sfnt_off000104a4.bin
024a70655909a6b71064d020ff35983e08210c60621417fc36530acb3aa604f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 17688 bytes
font_02_sfnt_off0001331c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1331C 16792 bytes