Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b7fa699df13774…

MALICIOUS

PDF

348.2 KB Created: 2021-05-25 23:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f95ff472969a54548cc9f0434dcd655b SHA-1: f170dee33c8b69054e4717614809dde0e530869a SHA-256: 26b7fa699df137744caa23cac0f0069386d31c12fb3ea044fe1400e50c17fdc9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites, strongly suggest a phishing or malware distribution campaign. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://smidgel.ru/uplcv?utm_term=star+wars+the+old+republic+cartel+coins+price PDF link annotation
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd60dddbf---rijigofasis.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/18606955908.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b82aa2e7cec415513d619e57e54b5723/21612515105.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090c03994028---94519653420.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/dadorpf8jl4sfmoqp569dgbe19/29184659229.pdfIn PDF document text
    • http://garderoba.sk/images/_file/wefuluvapewaboxo.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9503a50d5---lepujifususogevaxiwulov.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vvqt6j3gspbltbdatm5nmmfgnt/xavobubowusimowiferor.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/0c8f978db7d7b5f0f533f05aa491f4c5/15540069884.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/31425956146.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c55761a673---bimup.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/27023868895.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098774aef5b5---16308139743.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/t6c1eposreo9aji3jskn68uh1l/54491851171.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8c292416---87775680942.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746dc1bfc06---manuvijajodi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0bcc353e---pawazojufaruririvabimevej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004d3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3E4 16588 bytes
SHA-256: c6c0366a4f28e70031a7cfba9f1cda38e33f16ccd0a85cfa8b8f561398bc116d
font_01_sfnt_off00050856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50856 5496 bytes
SHA-256: 7d2c389dd2e2da32ed663b7de1fc2ea85468d33891ca15da2c403fa517910071
font_02_sfnt_off00051b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51B0D 15992 bytes
SHA-256: 8514be3bc9290f99589bc09e49892a8714a39f217ef6dc6d8d19d3eb9b1cb239
font_03_sfnt_off00054bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54BEC 16108 bytes
SHA-256: 71727a5f61945565ba925525dc5e97fc15060b6b47aecd4c775f73df5581ac1a