Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dedf8edb7f4396a…

MALICIOUS

PDF

85.6 KB Created: 2021-06-30 05:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 568fdcff0dba0c9fa079008784a18f4d SHA-1: 1da9abaf0ef6add746f769fc0480604d51d3e44e SHA-256: 7dedf8edb7f4396a0006223be75148882167f35feb815abcb95a7280ca150a02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress sites, suggesting it's used to redirect users to malicious content. The PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/9aa1fb54ba96115010dc257316284b88/lovovotejasabiponir.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9164be5f---litowubopapedidejakano.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ssbjc4nomjh8ahtfi0tbvn7k41/48865808403.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc70beef2a---jumag.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75786ae376---56682300392.pdf
    • http://china-hold.com/UploadFile/file/20210513230344940.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/44953749923cb8b9194fbde4b5df8cc9/jovorelowunimerom.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff876d0253---70793545190.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f4d91b16571838ab746c5441b6fbfcf3/59969640543.pdf
    • http://www.ecvbrass.ch/user/web/file/sujoxarudexupusal.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/0274ad03969b31581b687a2105ffcc16/gumifasujexanazumipibo.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccee87f87f---55954420741.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b010661e08---26763856294.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/pk8e93gascajd1j8p4oop1vgp4/zazaw.pdf
    • https://ivanamihic.com//files/xujisev.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b10da1b0b8---zaxelufemel.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/qk65pqleabl3b31d2j0joo1f5q/xibijijofirudev.pdf
    • http://ncabhsa.com/clients/875427/File/xabufibara.pdf
    • http://dush-kz.ru/uploads/fck/file/10761296391.pdf
    • http://ongnuocdenhat.com/upload/files/47031040289.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3eb14beaa4a8edad0a7649ab7579f3a4/10260529014.pdf
    • http://lookkorea.net/userfiles/file/jexowozadomolurojafe.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5ab68265de9654cc3f96f32ed8965490/vunileti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mp4+hollywood+dubbed+movies+download
    • 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_off0000ea49.bin
08e659e836d3fcd08b66fec6f7ff0337302065836f21c35708f6818f473f9d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 11036 bytes
font_01_sfnt_off000103a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 16792 bytes
font_02_sfnt_off00011bb4.bin
32c247be7263d9dc94a64f027df66799d734b302323f08f36e7bafe853c588bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB4 17268 bytes