Malicious PDF — malware analysis report

Static analysis result for SHA-256 112eb1ec816e494f…

MALICIOUS

PDF

132.8 KB Created: 2021-07-02 02:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: a5006bebc953576350ad21b0de9b3f1b SHA-1: c49f10146aa0467cd84aca717bda09e3343eea2f SHA-256: 112eb1ec816e494f5cb07dfbb3e3972f987f30c571e0a052c261949592209d7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.5265

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://krisoc.ru/uplcv?utm_term=meditation+of+my+heart+be+acceptable PDF link annotation
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092226e9a2c3---41988935774.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/39ghqo9j1v5aot1tia91kl2sl2/rejexifibofemibarozajul.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c841d50ac---sarebejamitob.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0eaquthfnrl4pta6vobslfhpm2/nupovubakix.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/5gj3d7n3t8u4ajj2qre2egl4q2/68714284519.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/afa5c380fabf960f02b34a32b6128d37/74855048019.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801e289a11d---fifuxojubimob.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e4fad01df---vikokogawebukazunizu.pdfIn PDF document text
    • http://palami.by/images/file/51912254028.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/govelatevamawuwiriz.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af86fdd6975---jidon.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/81f6b270ed6b8a41166a5bed8cd8115f/17623129940.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/tifejafomunazi.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/fejajejazunezajolilirutez.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/medovazekofevegotimobol.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/e393022ccfc6sfbi0rc4dngcgi/6514451195.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/nodosuzed.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/87017222491.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/1525838506.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e7534c01---jafuzifesazobaj.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607166254e99d---61248321351.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/lolipetanejew.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/42328414931.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607853da19a0e---wibelobifokub.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_off00019a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A22 21332 bytes
SHA-256: b60226f1c1f97ff721ee43fb8ea4485e007fd1295e8dac1544570349d289fe2c
font_01_sfnt_off0001ce68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE68 19412 bytes
SHA-256: acf25d2539d7f787481864c4ca4709f94ebd8640682b723e613ab8ff8fd2b942
font_02_sfnt_off0001efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1