Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4b502fa20305a4…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 00:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7dac22cc7f66756ee190d13f9b541d63 SHA-1: 5260bc5cecea244f358ea637ae18d1f248271d85 SHA-256: 3e4b502fa20305a410e71afb6495bd55574be0ecb6033bfa2ef4242ac67fe8fd
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various websites, many of which appear to be compromised or disposable. The presence of multiple links to unknown PDF documents suggests an attempt to distribute malicious content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://canevastoilestjean.com/upload/editor/file/ronopovuxirugubetedajava.pdf In PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/rugumipupaloza.pdfIn PDF document text
    • https://murten-hotels.ch/userfiles/files/vudazasuzowegenugowaz.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/4022acd35bb4253c2e4c3292a931cb45/40652841799.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/gakipepov.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/zofaresemokan.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/90933774979.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/87712216027.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e743aece8---16302625974.pdfIn PDF document text
    • http://atya.eu/files/file/nepoxepuzezisav.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160df9e3532cf0---78793158729.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a500c3bd118---wedafikusosadopowud.pdfIn PDF document text
    • https://777mto.org/contents//files/ladarofomeziketopupu.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d21807912dc---45637183774.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/bibugilojizow.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c53b4183f4---vajanagipovasabu.pdfIn PDF document text
    • http://exima.kr/userData/board/file/47668912135.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c501aecbb7e---75602291517.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160de41aff2047---dovogafoli.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/xopakorutapez.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/169030c6acb4cf1d35713e38c71d6a79/26307667852.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/htkarlen305crd86otm8eqiku3/4677548685.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083baaba975c---lunekakobegow.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/32329136152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=thematic+analysis+qualitative+research+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_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 17420 bytes
SHA-256: b817c8def6aa4c51bf6864db38b683a0e0095672f676fa0dfe0cb4e9f7758b80
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 11152 bytes
SHA-256: 48168cae3eab95507080b1bc3710593cca4948e67b875758e1efed7bf42106c2

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