Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce911caf392f5a1e…

MALICIOUS

PDF

90.1 KB Created: 2021-07-02 11:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ae40d7bc07a81260661d86aa032971f2 SHA-1: bb8560d96fb1cef88b32b4236d63dae7edf4508d SHA-256: ce911caf392f5a1eff799e57d0d8b0e84c7bdc57efed546c43973e66cbb797fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7609

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=according+to+bronsted+lowry+theory+an+acid+is PDF link annotation
    • http://cs-web-design.de/ablage/userfiles/files/mewagikanepurofi.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/2jq9icro4lk362nf9dp2e1tt23/7034174201.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac41c2e2e9---64315749730.pdfIn PDF document text
    • http://bronia.org/userfiles/file/kunavofowopa.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095e39819e19---19404592606.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/viriwagexezafe.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/7b93985146512c587e7180079e0a4308/jipiwinedepu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/62e9e3f5d545c53f5c95a68693e105cc/refisukozatejovova.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ee0228232---duvuxozovominaba.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/dqm08rid5kshbiu8e3mt2vgo5h/gewude.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/efe4e5873d82c6770473b4889a021584/wawenumitimul.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6ae4bbfd---12416366942.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c311ae707bba0ac02e06fb1987d0de14/vuvotazeju.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/bpme2i8q96ooi4n91m722g0n9e/71398753276.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086876b4064e---54885634381.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4e4fdf06a---99185399179.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/vunikazitarofikovezo.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987d3c2ff39---sidimomosepakurizo.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/pakozuzuga.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/517a6a989860b28fa681b3205169981b/totuxumezori.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/5562480409.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac83bc323c0---suliwavezekomijive.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/96380141978.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/66851102376.pdfIn PDF document text
    • http://pk.mo/userfiles/file/78001231512.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 10968 bytes
SHA-256: 84dfd088b50421381d5e82851cb608c5df1059b7d3b4128a7b20054def7bcb4f
font_02_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 17860 bytes
SHA-256: ff7960140704388e25931a1003098c7fd6d49cadeb354ba7bafd5f93a07cfe3f
font_03_sfnt_off00015441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15441 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878

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