Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e5c07f88e513b9…

MALICIOUS

PDF

76.1 KB Created: 2021-08-20 02:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 86064a8ef5b51aa49f74c11ed7c311a9 SHA-1: 495dfa2414b8f9ed9ca99c83c7f63bd48c4236ab SHA-256: c0e5c07f88e513b9185bbc0a53b3391284922a317b7a0480c477fe8920c402db
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The presence of a 'Password-protected archive handoff' heuristic indicates the document is designed to trick the user into opening a password-protected archive, likely containing a secondary payload. Multiple URLs are embedded, some pointing to compromised WordPress sites, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nbpcpentecostalchurch.com/clients/65183/File/nuwulenoxogogevidukeve.pdf In PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88dfdd03f---42680312065.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210625_8847B82F4EBA9871.pdfIn PDF document text
    • http://stl-hk.net/userfiles/57466290829.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1f83ce5877aca95751e82a22637ba34f/xolewigovuxileluxubawozuz.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba455fd297c---faxobil.pdfIn PDF document text
    • http://sdds.be/userfiles/file/99009804021.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/urspcbtbq78fpuud0748u875gt/bezizotapenima.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b91d90ada0106ba0eabddb411e1f0ec6/nipeliniw.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/12827d98e4e86599ca1fa9d07da6b73f/57909183975.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/95762476935.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/zajakogasegotanuraxiz.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2142509147---74215924818.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/goxiwobovokajeto.pdfIn PDF document text
    • http://artepcb.com/upload/files/dujanerejos.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/kowinisako.pdfIn PDF document text
    • http://schubert-hh.de/image/file/zetanevotig.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/70401629914.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fjpam1c4uk6qq938k1gnavq6jl/16523237387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+change+sentry+safe+code+x055PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 11168 bytes
SHA-256: be878abbcb2a5f3ff5f04afd1199216964448cb06b7942e64af633d1abad518d
font_02_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 16228 bytes
SHA-256: d3ce38bc6c7b2689057b576402e8a670827245c5d5af076b0eb74a457ec239ee

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