Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4446e325e8f2041…

MALICIOUS

PDF

122.4 KB Created: 2021-06-28 04:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ef1a73f9748b528d4b0a8a5277d1028b SHA-1: 261f1dfa60799539695fa661adc59873f6568159 SHA-256: d4446e325e8f2041aaeb35333366a022256a458d0baeaa2ab58920fcd5e972e8
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fe4bb27bd---zivegupixakovu.pdf In PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fab50fe0c---setojak.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/xedagudosizexaxagef.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6d19b8c7---wujamisufuluxopi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7a239cf39---setodifi.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/logerosebusidafigum.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/wafekedudin.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/2283781253.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2f9a6c13ade6b196ddeb4d61d4c19088/1585569212.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9f9bf3bd9b378d6b0292d14d49b44918/58902523612.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/g4b5fvlgj7r8mjvu4mshetkai4/96515015441.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096360256d7e---76234444329.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607140f3d168c---37711627025.pdfIn PDF document text
    • https://kopari.hu/files/file/13336976235.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b38ee19b4---9023759331.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/piliv.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee477edb8---34553543081.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608561c6d048c---27316254587.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c96006536---xuwimivoduvolelobebazoj.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7d23822dee0bf2676e263352727ec88d/xaletetasamogebiw.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a64d49c8368---pizasupotoxumojirupej.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/66498901573.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086162345a7d---95303032284.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/xijitujazipil.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/qvdicedj7k3e461no3en2pge8f/xakalijowanobokenim.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e886a87d5c---xutawizajogegalup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+vice+city+imagesPDF 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_off00017e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E0F 17572 bytes
SHA-256: 207db585b35fe66c9fb485c8295c4e6ae63384fccabd85c2a64fc7f1264c7a05
font_01_sfnt_off0001ac1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C436 10420 bytes
SHA-256: 7308e6fdad2e4a3c154b2fb37deba5f7d7d6bea24671420e513b389339699a5f