Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bee68ec2929d610…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 829f2ea1d823bd53f5e6a402d57d6e6a SHA-1: e121772bd9dd39467a154411278d6d3041aac4c8 SHA-256: 9bee68ec2929d610b12154941e663278eca8dfdb2418f45dcd13bbebc1472c26
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or engage in phishing. The presence of numerous links and the use of compromised CMS uploads indicate a strategy to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609272afaf3cc---mikarinodiralupugadobok.pdf
    • http://abbwingslynnhaven.com/uploads/files/futivogonedovax.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ab9680a353c13d0da91b8c2ff4095f94/sutirerotelavutituzufok.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d760548f1b4---2774353642.pdf
    • https://photojet.bg/userfiles/file/89697651706.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/f1fe68cdc3b87660decc19a6e70b5f13/24791074383.pdf
    • https://culturasiapamplona.com/guiarte_userfiles/files/83740373562.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/7vaf6gdr1rof6k4tgmeuudgn7l/53029793019.pdf
    • http://www.tramag.pl/upload/file/80593244537.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f673b6097d---fikivavine.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1e2b2d4b---xixomesofibiseri.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160984be644dad---70664005519.pdf
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/buvederev.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/fabuvebipa.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4ce57e9484cdeba8253806bb95a06f34/64115031819.pdf
    • http://chapelguild.com/images/usr/36711320889.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcfad51127---gomofinesinokes.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab56fe72c37---mevopowerogorar.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d24e87a817---dakegemajepetusexodipeded.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/9lic2c6t5gck5s1cldr4vocrrq/ponatisogorupik.pdf
    • https://hinodanang.com/uploads/image/files/pavel.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/81475d6225c4934bc7a0f9bdee9eaa31/bofaxegol.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cafcbea86---60166239990.pdf
    • https://tidurmalam.com/contents//files/sezamuwigolasofimoka.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a62aaad909fa6529658f1fc060474c9a/nakikasusad.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b12f9a6a67f---mavunejagejatimeve.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=2011+chevy+cruze+manual+transmission+problems
    • 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_off0000e943.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 16792 bytes
font_01_sfnt_off0001015a.bin
f6ed82df36c65d358f5ac8e2cd27c75ade7cdb830239aae6bd8eeaa794608482
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 11316 bytes
font_02_sfnt_off00011bb1.bin
681d1d391f3ffcad80562fc020978b89ea0c969b0968117460f8b76d692fdda6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB1 17108 bytes