Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fce2e3d04fc849…

MALICIOUS

PDF

74.2 KB Created: 2021-06-26 01:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27226c151f93b498f382c5340da81a4e SHA-1: c418bd6c7133ec07817bb507e8d3de92d2fb7b15 SHA-256: c3fce2e3d04fc84928fed0163cf3f0acb2cfa58301aa75cf18f674e297dc2e04
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://harasim.cz/uploaded/files/78954312715.pdf
    • http://saptpadi.com/files/file/4569512572.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609889d40fac6---32201078902.pdf
    • https://betenagro.com/sites/default/files/file/jefisasirizedipi.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/46a8c59eb34e95c1f26b92410956280d/surafanuvewel.pdf
    • http://dichvugiayphep.biz/upload/ck/files/lobukijifunemunugakuri.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/78f68c74015b367c6dd97baea51bc77b/rikimuvikujup.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/e39f7360a595fd388f10154d09819811/jejexilizasenev.pdf
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/nijomiz.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/50d9350a892c05d3b34bb0de58b4f8e6/12193653674.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b0b5608b0d5099901643b7e5f3866064/sizilunepilapax.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/52e305ac3ee229b83bd6abcae6390ffd/jelapamibezokol.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fe7fe26e1---fuwezamezisupizexowu.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943657c1121---samijotiwuvubago.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/86807df0c3f466a7edccb09c9767eea9/32726954669.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608df9e836c65---54307722310.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb490cb9c9---mimem.pdf
    • http://btc-ltd.com/upload/file/ramevanotidosorula.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c92a0b0b1fceff843371193dc23bb9e8/matonax.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd32739cd3---lodowov.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4796d8aad---zakamajokinizafoludel.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ca92fdbc---88264181457.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/2fa80e3eb02d502c6eabeeb5bdaf2bde/43321716555.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d3e73529c4059a78ba077d47d65b3525/33944517963.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=cards+against+humanity+expansion+pack+2
    • 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_off0000bda8.bin
fe31e0a7bcf3ce66e5e75a1abf733894a06c581cc38e5959e7527a16bcbefc90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA8 16296 bytes
font_01_sfnt_off0000e851.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 16792 bytes
font_02_sfnt_off00010068.bin
929920b6b0f81e3132a49f14d25bf1923f3895123d4610a9679447d602ade94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 11476 bytes

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