Malicious PDF — malware analysis report

Static analysis result for SHA-256 68beeb9b178bde10…

MALICIOUS

PDF

88.4 KB Created: 2021-07-01 14:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c02668a4d83c26da4e7937873a92aaa SHA-1: 6e622409e7104b01e653678ff6b1953faf9d68ac SHA-256: 68beeb9b178bde1091428a365d76c94f970b8607fddb4e64af394c52427bfdf0
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of numerous distinct hosts and URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b1a8d31e3c4758f3cb343de1f4c323d1/92683222216.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fcf75313f---rufil.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f24937bd6e---fimalerabe.pdf
    • https://perfecthospital.org/FCKeditor/file/74008566719.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c6cd6331b---53183307625.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/3nilvtca2s1tu7pul9jiemka75/xagobabijizinasoledevulo.pdf
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/50977167120.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ttcsugr5ahj37qgs0sf19pta0m/zevusuk.pdf
    • http://bigxra.com/uploadfile/file/2021061007331173499.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae935a74cb7---dutevazewasaf.pdf
    • http://mobydick-band.de/fckdata/file/sogewibutebudozig.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/14c8546d73715329a3572382abfc8026/93986396277.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a9687bb72f2944d369c61ffba4d9e136/vagefovewunajekinaz.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91f96b942a---tedovixosakesabewavinil.pdf
    • http://stonebreaker.at/vinutij.pdf
    • http://smartraoptics.com/fck_filemanager_upload/file/32653836407.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb33b68ae---foxodumotivu.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a453db88739b355e3864d6efd8b70fef/91009483292.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/6248a6d0e6b1c16657bc7e3351728921/doxaverafawafuwoluwowoda.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d530c529fb---zolosokasipegamezebaw.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/99017618620.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b00a52615f79d0e37e3ba7ef7dad03aa/81708848662.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/6e44137591a91da3e955da5af08cccf0/40134842707.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3b724b3cceec1dfc2a58d7933282fa7/16724756783.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/feleselatu.pdf
    • https://majubesar.info/contents//files/1193050698.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3j4phdo9g3ms75t527nskd121f/wosemoxuxojevipufav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ffxiv+musical+instruments
    • 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_off0000f8b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 16792 bytes
font_01_sfnt_off000110c4.bin
ee7e10464d5c1832701786645fef80480665a39105d27949f83f1d6638161537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C4 16760 bytes
font_02_sfnt_off00013bd9.bin
e1742b8ddc9300b12ed3c9e9e5695914d73a47ebf8ad31f52e9bfa610c1f333b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD9 10620 bytes

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