Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7956f2558bc5de7…

MALICIOUS

PDF

209.9 KB Created: 2021-07-27 13:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76e4e8070953b05e47fdf9f000ed7277 SHA-1: ffdf994d50b92fb559d8a77fe0e3581ffeb23f47 SHA-256: e7956f2558bc5de77f11a88b238affcb0e0d0f2bcb8aeb79288d15232f26d63e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The presence of these links suggests an attempt to trick users into downloading a malicious payload disguised as a legitimate file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9859

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.
  • 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://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/841685b7f1ccdb3133ed2a510ea73753/nenuner.pdf In PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b53dca2e527---26337261289.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/925383ad0a394e520bbcb44710759acf/rusipup.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/a1229747db2a7f10a092bc2de838edd9/30911064941.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/n88hucshh7v123j7c3v6anbv5q/xibadobigowomajowazoji.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a15241af8---28526299367.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/vazaxoteparuka.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d941bf6e89c---nabikukuropexijimotalik.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079333f7d1f5---jesuwerapabuwuwu.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210605_F828B2997C4F346E.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/22907357454.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d845ec3c0---toredopusiw.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606da61ddc3f7---74893935568.pdfIn PDF document text
    • https://banghenails.com/upload/file/67177893499.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b67ed7ced---zuzijerov.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a054e1178ab---83975258491.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609779fed048b---69977630878.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/bipefavu.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e997bc287597707c5cf5f8a0b815194f/nuporiruxarulezoxu.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce28a8d29---tawibadi.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/jawogibewujorinew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=vidas+secas+download+livro+completo+gratisPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D456 20636 bytes
SHA-256: e5552f63d3f0e95f8a48a17351626f753d6d562fa5a34147679a4b8f3d946095
font_01_sfnt_off00030615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30615 10976 bytes
SHA-256: f99518eec5db8bee0f7bdb67383d1c4e9e96cdc0b36d8a370ac1e3bb006af41b
font_02_sfnt_off00031f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1