Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0b968456145583…

MALICIOUS

PDF

76.8 KB Created: 2021-06-29 05:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93a1c5f2eb666574952f2b76846e86ff SHA-1: c71f5ef9f868788fac2dca18dcc5ca6723886e5b SHA-256: da0b96845614558354d932a7d6576c58a2a7e6cf5add5e68f2b91d145b0e7ed9
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/aadd0f16f9877a9382dd969f8a4880fc/5277813296.pdf In PDF document text
    • http://yuha.be/_files/file/tutuwudujisoludilojejibu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e6c3a9f4---suzuro.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ceb3a9793---zafukenifidakibivuxuvimeg.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/50051888726.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/62020504847.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e9b5796aa---nofagix.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a455e386efa---podofakugadikawaromajuj.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160728779bca5c---32552853427.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/bopimemuxemovawizubagu.pdfIn PDF document text
    • http://falerisztika.hu/tmp/48772848785.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724e9dc84e4---83846681139.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da458dbacd4---84696679456.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9942a441---fupapadilajufuboj.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/26811498246.pdfIn PDF document text
    • http://ibb-online.ru/f/file/vubasukasuwejatafuva.pdfIn PDF document text
    • http://alkanboya.com/files/file///pokejofozebixatekajetofu.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/furibukatise.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/591170105.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/zelere.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3cd12bc3407ce64878baf6862d07fc5e/3118038529.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b13b008aa6---nunozoguragojo.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b4fb1c8cd---rinogomafobojax.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/31473380567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=land+pollution+for+kidsPDF 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_off0000e6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D4 10508 bytes
SHA-256: b4d9239201e58119f8e29fa174e132411472d2205377ed4ba7554aac36420744
font_01_sfnt_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 17100 bytes
SHA-256: f218ba4d7cd68acd7f6136343ab569edd497a8ad382c741721e1f876d8cc1c30