Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c8c762704d90dd…

MALICIOUS

PDF

89.0 KB Created: 2021-06-29 03:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64cb19fdd0cf2b26fdcdec12502b0405 SHA-1: 6d3428dd1d07987a9b06cce15ccb2240e3a4b093 SHA-256: 70c8c762704d90dd63e5c08f7c18d1501b0e6ebf7992d16ba61f915afb50fffe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, indicating a link farm or distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure and heuristics point towards exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c4aaa2556---mawesa.pdf
    • http://beachfirebrands.com/userfiles/file/38395670751.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fcb7357d0f57b042b8990b0f9157b599/32285182820.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8901e2716e6df8eefe242845ec7d4606/dotemunezuguwujasipusos.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b663ec05bfb1abb3e8740eb116b56e4f/sozuz.pdf
    • http://kovacsoltvaskerites.hu/images/file/87624369550.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/eba47d884f9e6653fbe205c25f5de7ad/zubawimatixozele.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d66ce7f265e---nilurifadewasetobe.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6982cc8a---17081097260.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7164262655---92966719682.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/29928b14403f52d522f68869d8cacdef/fugopulugit.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160977deddda76---noted.pdf
    • http://banghetretunhien.com/media/ftp/file/67245920810.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b491c4b86---76050944120.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/27de3c0ab975b1fe2d8bffc247400c6d/99855246663.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160844f484a771---12695531345.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c748c0ef061---tugere.pdf
    • http://ahxxzx.com/userfiles/202105/file/58435398527.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbda7d6b3e---penomane.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/68aoh6is87k7h1ogsqp9jbgvjs/48964609876.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b355d6f7d---tuwusoketuxuvuruxixomixa.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a50280bb02b---26055261836.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e164577511---94167268253.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/q0cnuilhisgmp9qnoc0js8jhmk/vibij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=degenerate+person+meaning
    • 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_off0000faa3.bin
01e0896cf82c07c34b4afbac439e686e19e189d55356e3367a56e869a65a0154
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 16956 bytes
font_01_sfnt_off000126cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 16792 bytes
font_02_sfnt_off00013ee4.bin
2af48348e40adf1978e2d8806d686e5f61bd5baed097778e8d53d1579b4b2c2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE4 10552 bytes