Malicious PDF — malware analysis report

Static analysis result for SHA-256 462771e01163c608…

MALICIOUS

PDF

71.5 KB Created: 2021-09-07 18:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 68bb94f6cb721141f97b522f904e40ea SHA-1: 0a92ee2b3188b8b40f1a31f6dba085335e725e48 SHA-256: 462771e01163c6084f5c580b483998e1f3706bb312cdb1a39847224c35c22b26
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.2573

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://irlanc.ru/uplcv?utm_term=fourier+series+examples+pdf PDF link annotation
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/04795df58592f9259a3a99d83460cf42/kakokirapemako.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/97639786742.pdfIn PDF document text
    • https://windsbs.biz/files/file/zibapaxojenez.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/45421391909.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/sugopumu.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/tosalisisofobelutovel.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/39d954615168be295584ed5bf4559dcf/sepafanomuzadubowojolek.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0f78c49ba---68448315874.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/lonubozanisodilirizebo.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/gawexix.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160908d111ffff---jeruwepugoz.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b981f42358---basavurexufoxaj.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/13380193051.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/8918683879.pdfIn PDF document text
    • http://machulski.com/public/file/gepaxa.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/73532206213.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/822d0827c63b19273b4a43d22d380fbc/zudisuvigugekakukuwezulex.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979c9daecf8---xamenutilafedorisijosito.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/65050610488.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/86585973622.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a3575b1e67b9abc6d61b89334fb43b1/64973507819.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/41808811879.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/lezofaneso.pdfIn PDF document text
    • http://europawindow.com/app/webroot/img/main_content/files/najomesapetiviv.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/44164051765.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/nojomifitisaxeritipaga.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000c69f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC69F 10636 bytes
SHA-256: 88d9b931864b409abedd06c667c3e84704028cb9dc9f5012a24b048e55e8e276
font_01_sfnt_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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