Malicious PDF — malware analysis report

Static analysis result for SHA-256 469667700eef9d83…

MALICIOUS

PDF

85.6 KB Created: 2021-07-16 20:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7a02ae787f651afdfd5dd71c875797ea SHA-1: a841d988c7c5bcaae08f8eb1c6da4e26f8d78e13 SHA-256: 469667700eef9d8328aa4da62a43569d8d0c05f9f74156fdc717d4539c74660f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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 http://telekommarketing.com/firme_data/files/53680239870.pdf In PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/20gpcv2u4bkfd6hqg570a33s3v/59913494974.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ad3b8f483---62772377326.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/79a734b64474ad0bfd4092ef955c390d/zimafisaxekobav.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdaddbf322---lebuvovuxipowe.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbec68c5666---pepiwuwixixefimuxasov.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ei5dbhnll2vsr2u8s67kova4a7/8501317754.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acd3663b726---16935317750.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096a0a72fa90---71452710215.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/30443434682.pdfIn PDF document text
    • http://polletnv.be/uploads/files/19790399048.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/gefopowidaxepelasiwosubak.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074160465d48---64827759242.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/358vll0a7h4ipdk9huu7mato60/15367484555.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/tofh48u4hii7dnafm4kuqg00le/80055374276.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/tanokudilitel.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/negezu.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2087e15d5---85450421070.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/37f0825ae279fde2af1a813a8c205048/gawowomarameka.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/84410776439.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/90485358515.pdfIn PDF document text
    • http://ktcz.eu/files/files/17427623974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+much+does+a+family+lawyer+makePDF 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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 16764 bytes
SHA-256: a89e76c3ba19a37e00254f1cbf6b1513cda996503a05519f9d3c2c540322121b
font_02_sfnt_off00013087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 10920 bytes
SHA-256: 06b1b45a153e081ac1f3b97f1b844154f388c380c43059bb424be91718b54aa2