Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca110875494387a…

MALICIOUS

PDF

85.9 KB Created: 2021-08-12 16:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eb150e8104e00f8ba615fc135e379ebb SHA-1: 206e139164895412147a678f20974faab2a917ea SHA-256: 0ca110875494387abb0617001ca375785a574def06852a1952b9a08479d5ac99
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's structure as a link farm suggests it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9268

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=7th+sea+2nd+edition+pirate+nations+pdf PDF link annotation
    • https://radio-aurea.eu/files/file/92810358736.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d102254d89---56898625595.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/84105205250.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/satisonopuso.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/41592732266.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/74990268657.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/65854447839.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e505d65683---19944057319.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/68lo5rf6sfa6unggms9rpfmdqg/balamiduko.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/j5nhvpf0nk9b9b7s3vrb8fkvpv/83891258928.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/regifobodesivoxolovu.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6875890e1---lamufurudenizanudoronizuv.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/jopojoganemaw.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/mibiwetexumep.pdfIn PDF document text
    • http://arslanemlak.come/file/wipavudija.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/b2f62d5a6bc528233b8741ef874e0ceb/tijamokuzomomo.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6cfceb4403---duvozodigimupijoxazogur.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/54252065370.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/7870105612.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/24020144368.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/40131881883.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/79tudrqnqb7dh82o6a5tct5ff7/letuto.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/f9e97a810037f5fba08132407847507d/tejedavo.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/bowedufagosizotinatomini.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001312f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312F 17196 bytes
SHA-256: 3d699cf9b0a27a990782e332da89df6f6ac57ff1e10b91e77c781212960e139d

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