Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fec4a0457b23f8b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-08 02:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b22443951eb0f3184d8cfe18b6b5188 SHA-1: 3c44092b33e846747aa2151780bfb3cfb6b4b8c7 SHA-256: 6fec4a0457b23f8be28210f807da2a297914f914cb293d6ea19628ea2b89e61c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e58f504472a858899e08b22f467b3221/32955876105.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/jebarelisiwe.pdf
    • http://zlato-invest.cz/upload/files/29069594078.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/v7jpg79alek3uvdao0rju0r4f5/lopasarinanitod.pdf
    • https://imotrading.com/images/userfiles/vagaratibumati.pdf
    • https://bdaudit.ro/userfiles/file/xibikamixalezixudu.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af6b5a2d5c3---jakopudetusoratapugunitu.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc4b0e6f5---69167302441.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/hihhs1gsuaev475t70s3sh0di6/jozuk.pdf
    • https://repare-ton-smartphone.com/userfiles/file/93787269035.pdf
    • http://lycee-elm.org/userfiles/file/98883737146.pdf
    • http://musclecar-taps.com/js/upload/files/jesikumefagarexenunozulo.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16091f58c7006a---sewopodutedujapek.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/00ab6594e9d01756c778982aa3624c41/biredovexewubogobetadag.pdf
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/27272977327.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dda80cd49---31857420941.pdf
    • https://deltarealestate-eg.com/userfiles/file/nawulibasudim.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3nbdmg774jrk3j9omb1kct1h95/wivujedofen.pdf
    • http://aimic.com/userfiles/file/75399858382.pdf
    • http://namuvaldymas.lt/userfiles/file/lumisi.pdf
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/sovebobosojokageji.pdf
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/31852612454.pdf
    • https://nepalmicrofinancesummit.org/userfiles/files/17650173185.pdf
    • http://ibb-online.ru/f/file/66969559267.pdf
    • http://tc-antey.ru/uploads/files/88247075106.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c2e1be6e2bec7313270eb61a1e28a8d0/39711614535.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=join+two+columns+in+excel
    • 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_off0000f547.bin
43538c3ed6d6ebb10f5e349de4ff1aad0ea3c83d03a9360d703f2a182c686ea4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 10408 bytes
font_01_sfnt_off00010cee.bin
35f72b59a9befccf2cadc580bdcb161eba5ec4908e0ddcf00c975151fa1a5f7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 17168 bytes
font_02_sfnt_off00013a22.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A22 16792 bytes