Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92d332a8089f33d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 03:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3a1171101f565829f9cffc4b0475292b SHA-1: cb634c203db1298feec460dc70a67d8740f0a9f8 SHA-256: c92d332a8089f33d3d92139d909d73f3f41c54c7aad354924fcb898d4a0aed8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/fda128efb863c26f172e1ac0d90eaadc/funotoxelozara.pdf In PDF document text
    • https://autotronics.vn/userfiles/file/muvejovigoluvofagelawegim.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/rarak.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/2cf80c250b629501d154ea952027effb/zoxajamifamatomelanad.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160974f4718921---dotagomenev.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/93122639829.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ejv5rodt0bjhm1qonlv2577uh2/riweraluwukasi.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/putasokovojazuxuvew.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/97941196016.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608183959ac04---3476085612.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/60162364371.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/28033216184.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210606220604.pdfIn PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/komipajijejofagepa.pdfIn PDF document text
    • https://urologasdainys.lt/userfiles/file/48726969729.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/1476714609.pdfIn PDF document text
    • http://dentherapia.hu/files/file/64575869123.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/xagatadawuwuvuxexubozig.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f4648627d337b6b15055f1e4bf096481/towanozomovipidujoketeg.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/25316136478.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/fapurefanepegijak.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/wadebipumefime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=adhesive+bonding+materials+applications+and+technology+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 11368 bytes
SHA-256: 89020b612d2198643bc6c9b614b068435287a38ce842c83ccc6f8b287db3a461
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 17628 bytes
SHA-256: 9da55fec7824a6996f2c1b10c5c0274e6d6019c4b546723d99f6e879d2e66fbc
font_02_sfnt_off00012b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1