Malicious PDF — malware analysis report

Static analysis result for SHA-256 9291eb9e0fd679ed…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 17:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44de48b143e076e1ac0f3028c297e2b8 SHA-1: be8310f06067515c93aa5a3246d5b5816c062461 SHA-256: 9291eb9e0fd679ed9d7a80040fddcb78378b6422db6f42f17bc9b200ddbd2277
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure of the document itself is designed to lure users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983a0f3f68a---88911808823.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16da9eb1bba5a8aab46470350d015fbf/45019406072.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/44005543228.pdf
    • http://accessiblevehicleservices.com/userfiles/file/40663817522.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/k41o03hrspdmie5ljo07h4f6qv/nifimutexejiwofubew.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/5e4a3d1dc96c5e8199ef272037fb1d8c/xogupuvazilo.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc307bf25a---zupiwomezizinerateladobo.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/fec2cce7c28d885dbe279b03b061a73a/30331032265.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097719e17de4---95509871263.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14b2a93796---50705266001.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b67bfa452e9b882e1f3652e45721d349/76447187619.pdf
    • http://gptools.net/userfiles/file/92704530196.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e58d29d49---nezulineni.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafb9eea304---19134983107.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/79mpk5dh4urqlb90qqffmegd70/nenosupivunon.pdf
    • http://nadiadsa.org/userfiles/file/77987305733.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/cuecukoml944oln64e4vgiosnh/83530964232.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/jamasi.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7471cbc5f9f340c3da26d0f20cd62929/24317374086.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cca51685b---zupisuvidididalijepuse.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52bba51c6---maduzexutezoxixibasenaj.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mgh9fga53v21a95lfns27ld0ft/wuxotivozivej.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/c4f269b2acb5f52f5f4996a068bac3de/saninuwi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+super+bowl+performance+of+all+time
    • 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_off0000f45f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 16792 bytes
font_01_sfnt_off00010c76.bin
c68e01d8cd58cd9cec92b09b25beacb86cf8ef20e42a9db61ae4d7a152761cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 11020 bytes
font_02_sfnt_off000125f8.bin
8bc9bb7202a4fa8974759e7f06449a7f3bc993b922bd3fb9d20aa346a337f722
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F8 18116 bytes