Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f40cdf7e8e32ff…

MALICIOUS

PDF

87.5 KB Created: 2021-08-20 23:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 567aabcb8eefa7ccd30e666a6c883f22 SHA-1: 223c94fe7074be1c6acf83546f1845334aa4e3c5 SHA-256: 34f40cdf7e8e32ffcee498ddc287253bf8cf3ea87c9a3a3be0f272a4bdc1c066
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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
  • 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://toyotarent.tw/FileData/ckfinder/files/20210713_B92EC9A8E7232065.pdf In PDF document text
    • http://i-daa-wl.de/userfiles/43852583522.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/25542523642.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/riwazumuzixipaze.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/rivalazofowosakugudixukiz.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/jojalegiwagajebeneburulak.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d2116ce5d---84439368010.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/kikomalit.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/73745862710.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/vuvaneto.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/95646592820.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210803021250.pdfIn PDF document text
    • http://email-database.info/userfiles/file/97303202066.pdfIn PDF document text
    • http://cedarvalekansas.com/clients/875954/File/pebig.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/00f9d6cf5d0047f53a8a4f513c853278/74376092637.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/403caee88a697bafd2922bf52d9b536c/55547354769.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/67447881699.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ffe59ea4cf---30000655471.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609da472548e3---vikole.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/57876498524.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/mejumojubodefajogifajifu.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/bawixikuburibozibu.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/32283819137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=divisiones+de+2+cifras+ejercicios+pdfPDF 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_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 20388 bytes
SHA-256: ceedab9e8c41bd8ad4fe52b2c1882c274b9a362b33dba506e0aa37de24232056
font_01_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 10784 bytes
SHA-256: 3236bcc202c2d48ce94f29e7b6b3cae965a76cf819f87cba116c954f578317a2
font_02_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.