Malicious PDF — malware analysis report

Static analysis result for SHA-256 135ff6711d0d3800…

MALICIOUS

PDF

80.4 KB Created: 2021-08-07 18:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: d4800f86bc06c86c2b6fc04d00097679 SHA-1: db1e975882d51d67e45cb45a043a2c033938e0c8 SHA-256: 135ff6711d0d3800b128e6c9e1a57751c977c5559026ddf6de49cfa14c1798a0
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 0.3641

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://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/82c3cb607c381a692fda0b8ec7d0f835/78458617404.pdf In PDF document text
    • https://aartipalette.com/userfiles/file/60179521947.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/18217511429.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/tezigovuvofazav.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609167a04404f---69793722263.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0af716d3e1---37232951634.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/77508689865.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5f6f2c788---18328880248.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/bvjcdbog0i3nf2o3onfdfq9890/75412269700.pdfIn PDF document text
    • https://lesura.net/userfiles/file/jedupuxe.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/71629331699.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/km30rs8fd5m790pnf5fd3seqi6/kasinepodepas.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/2a2d6e629a3cc3a67edebe1a2782fe71/kirokubajo.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/77408831764.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/11207710445.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/xulefaxizivugokozami.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/63719676311.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/32045414877.pdfIn PDF document text
    • http://jarosi.hu/files/file/71136847956.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/xanutevotosogobowegux.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/73059038335.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/da9583f072e5ef29ada8d830dc6ff422/noporifexumixodefeponeb.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/254eef24cd3d7e6fed357263b0875add/58850754108.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/nobezetimelugigefuxaki.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/79072524419.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/savovirirunibejufukiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=rise+of+the+tomb+raider+baba+yaga+trophy+guidePDF 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_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 16972 bytes
SHA-256: 1fccce36314bf1e79184354cad79139d443a73b0ec4c91e351e260db56c4c8d8
font_01_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 11192 bytes
SHA-256: 4036f83fb9d6333a98c27830e3f1bcae480695a529eb6f15ea165b1786be0211