Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc617549364ea26…

MALICIOUS

PDF

88.1 KB Created: 2021-09-06 08:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc9fceff155b12ac29cf9480cbee492a SHA-1: 00a8b0baf78456d7ef461fa19770f076ed2977b4 SHA-256: bcc617549364ea26fae307e100da371b1397357249078e0de4a9ffa6ddf8e376
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure is sufficient evidence of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.herbertvanderbrugghen.nl/draft/sarevumusitajisebive.pdf
    • http://aloeverajuice.cz/files/file/lalemefoba.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f041f96fdf---53793629546.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c626eac8f---timodaliwakopepam.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098be51d3f5e---40017210752.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090291eac168---28945738840.pdf
    • http://terhautz.com/upload_files/files/41346211780.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0e7b645c05d7576ef2303a14f8cead6c/26354666687.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d92255af75e---98222905208.pdf
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/71946933306.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160924b0e2509e---wuvaluv.pdf
    • http://trungtinjsc.vn/upload/FCK/file/52317714579.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833a68b9b19---bokemoturolibikivaru.pdf
    • https://dynasty888.com/image/files/20210604_220034.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2578150fd675550c19611f8f507cad3a/vumifiwobogupelofe.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210906094558.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608960ff2c82a---20704463648.pdf
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/2546978529.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/cf7e3569d0b8248ab6f4e1e682530958/xokabexawewujigodam.pdf
    • http://novafish.it/userfiles/files/7665703444.pdf
    • https://bestcoloringpages.com/userfiles/file/bitiluso.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/50519a06e808e4c3e904ce79a6e71875/sariroji.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/saziki.pdf
    • https://warungmimpishio.com/contents//files/43284689749.pdf
    • https://fundreamz.com/ckfinder/userfiles/files/81836598980.pdf
    • http://coytex.net//ckfinder/userfiles/files/26506425175.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=test+de+wartegg+resuelto+pdf
    • 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_off0000f450.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 16792 bytes
font_01_sfnt_off00010c67.bin
79c6f11ade46e0f537003343b5b03cd4eea2f6efe50ee486c1097fad0a3ef9e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 10628 bytes
font_02_sfnt_off000124c4.bin
2cab3583b1ba4c54bbc42d61c112fe0f431b6199a99dd317d42df5bfd61bff49
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 17796 bytes