Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2c2d605dcc63e5…

MALICIOUS

PDF

74.0 KB Created: 2021-08-15 21:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: f27b5d3024c6335dde5d6be99fc41731 SHA-1: fff91e96e44b474776720f2274f05350bc67e221 SHA-256: bc2c2d605dcc63e5a47cf0cf446d28398f6cc89b66c68617d7ee8581e286da0d
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document's content is designed to trick users into installing unwanted software, likely to facilitate further compromise. Numerous external URLs are present, many pointing to compromised WordPress sites, suggesting a distribution network for malicious content. No scripts were extracted, but the presence of embedded URLs and the lure tactic strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://catamma.ru/uplcv?utm_term=how+to+bypass+human+verification+for+generators+ios PDF link annotation
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/i89mc9pssotfbcb1kc8ta22eru/tawimidetimuzoxagota.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/7814857280.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a06783673---mekufilumum.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/jikuzebibotib.pdfIn PDF document text
    • http://gtshotel.it/images/file/romibusemekawumololol.pdfIn PDF document text
    • https://inncredel.com/uploads/96881506147.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/49758128363.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/b3nploq98h5j2hmorejdv40eo1/79735585220.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c901cacc02c---89850590227.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/nabubidolunu.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/dokosofewuv.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/40a8c266c3826dcd01c66a2bf275843b/gifurukasupedegarovitijod.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b783de324bb---morarubigunekipozobese.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/balusevabapaxet.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/rotifomaj.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/kovupewobopagebora.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bff0406edba7a98800c7e22bf2d2bd90/gutovamudezafonebefopa.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076334bb0a89---mepiruradikugumolijo.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/68567820714.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/80695968355.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/lepowuxizivuz.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/jacpuvf5c63fgc8upbit60c2p4/74347956671.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/57487554297.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/46c462d7dfe9a18d73373313dfc643e7/93357453959.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/86780984950.pdfIn PDF document text
    • 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_off0000be0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0E 11380 bytes
SHA-256: 8626092cb6830500c07c3e1ca4a85d66ff623a85a42dac3dd11a42bfa2818875
font_01_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 16160 bytes
SHA-256: c8f0f75165f345b8f2c2fe55548d2c3a6464ede48a08458aa83ce4e7b8819df8
font_02_sfnt_off0001025f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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