Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a07aff1ddb0211e…

MALICIOUS

PDF

87.0 KB Created: 2021-07-02 19:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 65e7349777a81e99f271950496b29420 SHA-1: 0eaabf69af5f7cf1ea43ed2168702c129550253d SHA-256: 2a07aff1ddb0211eeb5cdcba4a04cffdbbb40c3cf6a203d329fe7f6907ea6490
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 0.3778

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 http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/kt0i0bdsl1ec97g5sueotsv863/velovusupetigobixerop.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af090012830---nikora.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/dulidek.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/n8m1bmd3vjjtltc3du1785ckik/wizarig.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78k4po1o7ffobmmnj7t6c5tqc5/beziwij.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/566457089bb87f6ae68b7bb8b918b630/wunepodopuzaxu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/84759f1e6ea81f0fe2a68e2eac0a99dd/kedodixagefowavi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7c4567a9b---fivepovinefabanawewozes.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a3fe6d3db---pibukofuw.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/24212041519.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae949ef590---liselopifepekuxaxizuw.pdfIn PDF document text
    • https://chp-travel.ir/data/file/tetebumamewixunoxar.pdfIn PDF document text
    • http://18554080.com/userfiles/file/88324910831.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b68d1788b4---tezimak.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05fe462b66---silegavijafeloniki.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c435acf01b1---16621141726.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160771291cfa49---16310266921.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/nesofofubanura.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/xutadi.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24d3a538c---39506321527.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160d875b3631a8---vonetugilapirabodepalupi.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/31502464550.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607269a9a04e4---wisedezobozalojurimo.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/paxulawebegim.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a85ffe7fc43---50699402782.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+flip+an+image+in+photoshopPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001083e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083E 10780 bytes
SHA-256: decef3a8be9212d8c434da182ada594b35cf26f1eeb7027fa20f3802f1d1deb2
font_01_sfnt_off000120de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DE 17040 bytes
SHA-256: bc1e2ef50fb530e9d6e493c3419975e2a9698d14923fa9313d9a5442f2a1c3f4