Malicious PDF — malware analysis report

Static analysis result for SHA-256 59da0c7b93928064…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 10:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 78ee33ab716a86dbb84c01929e28b713 SHA-1: 6842ed6b57a336cd2eb4ef9962c4fbbf0cafd072 SHA-256: 59da0c7b939280646fbecc4c06ce65c55fb26e3da3094a9a92470bbc57069f2e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing attacks. The ClamAV detection further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4505

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://cructi.ru/uplcv?utm_term=harsh+mohan+pathology+latest+edition+pdf+free+download PDF link annotation
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8191d904f---wugidewuwafinaguzabe.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d192f4ab157---vigadimexifotubil.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/612j6m29mu0j9o8ggicd21kat9/zagutisonenelukuvuvoz.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/libizomup.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/31708925101.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/sibokuguxobumanipeduve.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/65422e48cd855d07fafe2e34614162f5/74939181202.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610ab5d2a1fc4---fegewedetunaziviw.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c23f7c2722---16686514748.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb08fd1b90e---rusobokezurijeranejeli.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210811_A030D2B15E5CC608.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/83233957226.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a95bc2d44c---nopejoduruwufubiwi.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/bb4b32373b66e4584113bd0d9da5f5cd/34892839418.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/tolebenonaxamitipazim.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/duganunin.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/votakesufiwusumodu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609633fa96b33---5763996696.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/dba53b812e00995701f3b4c9c879177e/xedunamulexe.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/7163552612.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41a576d65---revivubameje.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0bf3e31aa---litimowenuvusonixej.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/fekizegojivutaxekujekix.pdfIn 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_off0000d09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 17568 bytes
SHA-256: f39773ff6a39e845a59d76120286380964d18bea5283ad736fcf31b5a56efa97
font_02_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 11136 bytes
SHA-256: 42b529be2694d89ea8f0499babbf1d551137fe85261298ccfa00ad3ad5e5b0fd