Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b13ab4856162df7…

MALICIOUS

PDF

74.9 KB Created: 2021-09-09 14:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 79e1d16a4906ee66758ccf2002c6a205 SHA-1: 812ee937e7cf9299c996edb0d12d19be17b5b8ad SHA-256: 1b13ab4856162df7b26c87a5c3487ae761d66bbe6884243bbcbd8c680f94291a
124 Risk Score

Malware Insights

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

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 0.4750

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://hmconcretemixingplant.ru/d/files/migusujakox.pdf In PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/baa344871b1593bc0e04629c3f3bfbbf/63339842452.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/34298340343.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/90771224998.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/selapeg.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/limerefekakavimumegef.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe2cd55c3---31141023557.pdfIn PDF document text
    • https://pmms-online.com/assets/file/914204739.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613317a86487d---kufelupezoguxixosamuwebuk.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/27169280659.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/voranifawowara.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/xaruwezizin.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/72098951218.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/kaxuduziroratigimoli.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/dh2e0fkeerj5fgjt1uc6oe2ju8/83857105531.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/zofozemeke.pdfIn PDF document text
    • https://path.mn/userfiles/files/33904351479.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/33044408807.pdfIn PDF document text
    • https://seerupit.dk/assens/file/45892380814.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/153603360861357d74042fe.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/rikixibixenelulozisite.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/efa53d30d2ce8ac923df5d2418ac5978/92991744932.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/vuwomubunowozotewosaleve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=one+piece+the+bloodline+android+downloadPDF link annotation
    • 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
font_00_sfnt_off0000e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 18136 bytes
SHA-256: afca2439fe41d0398d4014d297ed34275346bc131dbd39e5cba2d2fbe5f27fb3
font_01_sfnt_off0001118b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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