Malicious PDF — malware analysis report

Static analysis result for SHA-256 be14e2af8790858f…

MALICIOUS

PDF

88.3 KB Created: 2021-06-27 08:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47cf409b6bfc01719ea1015f6cfaafed SHA-1: 6a60df94f9dd0ef4b09fce648cae79ba784bea12 SHA-256: be14e2af8790858f475d5f056e85b11ce07641c0e1df4795567efcfac718a940
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that point to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of external URIs and link farms indicates a strategy to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=foods+for+hypoglycemia
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511ba4ec0c---lejijewuzajemolibogiwoz.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6855304968---92162457413.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/mo6oajos74tf126dut7aen5bnd/fukalafibireva.pdf
    • http://archi1919.com/smlclub-files/file/ganojuwux.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0ad088bc2f96058334bee04841d0f710/reletado.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14b478f4d7---mavumitolewilaxuzuvu.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c79c015d78d0a2e3f0557e9f0da90e83/76773758075.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/97fbd511f879928e2576cc27f547e21f/nukusovigosoruda.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wuzezativ.pdf
    • https://communeouchamps.fr/userfiles/file/31916985467.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea36ca9fa7---1981167648.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/stqrv0l328tave0vbubcro96df/7829713793.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e710f198c1d8fae9cb319edf30a6589a/mafawagokiredarim.pdf
    • http://ks4073.com/file_media/file_image/file/bugibupet.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d6d05995ecfb6705bc89672b0d1754e6/43043416445.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b010b14ca4---bogazejebi.pdf
    • https://bwawarszawa.pl/upload/file/lanuvutegag.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d576880d59bf3af5a2e648fcd0cf203d/39179997366.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607832211734a---12966847416.pdf
    • http://glotecgh.com/upload/editor/file/62781754805.pdf
    • http://sewakendragroup.com/userfiles/file/56309771614.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_off0000f41b.bin
8aa6553b76b9268595370231586eb832a6e99ce5b3326617d682bf2174f14d39
pdf-font-stream PDF embedded font (sfnt) at offset 0xF41B 10956 bytes
font_01_sfnt_off00010d46.bin
3143cb58eae2132ce465da9714d6781c4487574f5e4904bbdc97a291329847c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 17816 bytes
font_02_sfnt_off00013c56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C56 16792 bytes