Malicious PDF — malware analysis report

Static analysis result for SHA-256 794e3465798802dc…

MALICIOUS

PDF

80.5 KB Created: 2021-08-26 04:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 541055ec12b4e5f20c49e4baeda01ea4 SHA-1: 0fed6d3c878ea489fa5030170eaba0ff98d6b53b SHA-256: 794e3465798802dcac37b8fb3aca499a9c5c9bf5b953f331fd1bbc19976cde24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a significant number of links, many pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malicious content. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/bodudujizunot.pdf In PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/toledevekavilerivoluguzab.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/gaponegarobe.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/93781962737.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/033e48c0c3cab28040633b4ca081bc44/gisivorixek.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3002812ca17eaa6e869c160f448d570e/marot.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/benaninod.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/78594316017.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/rixopolisoseli.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8e5b3df5---1531311562.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/xizizifepasuw.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af697797a72---xanowiwuzipekovik.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/c4r3i6vr8iplmku8jj67tukmdg/salomokedug.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/77545566908.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fc018b3a9---towasofonakiwazilipo.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/45534889892.pdfIn PDF document text
    • http://alvitraders.com/files/lopewudi.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/335539046.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/fomosodegobabevasoxi.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/df5bb0da60aff4b70e1354a45cfd6d65/77419008415.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cef29c033621e05ed9b00ef57307c644/81347313154.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1afd88ca5---28326712222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+alchemy+of+finance+kindlePDF 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_off0000d62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 17424 bytes
SHA-256: 6c0e838e706f31307f5a354a89036ff5f190366d0ef53f308d6f74e43f4c89ac
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 10544 bytes
SHA-256: 8720957392b2412c1b73b82e64ab4457a12db6ae05272ce0de6e1ce15990c935
font_02_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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