Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3ef11fce2bd05a…

MALICIOUS

PDF

69.6 KB Created: 2021-07-04 07:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: f7a858f01603b794f20e294b417f890a SHA-1: 26168c5eb81cc0087255605d4d4a694768640b47 SHA-256: 9e3ef11fce2bd05aa48cb8b198e6c1c7613f82cfe5050561832424b81deab520
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF exhibits characteristics of a phishing lure, employing a screenshot to mask clickable links. Multiple heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=absolute+value+inequalities+with+two+variables PDF link annotation
    • http://dragoniresorts.com/userfiles/wimefoval.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ttnm9un17rej885bm279rek2e0/94824652471.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160adbc8a93651---4308671171.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a0322fb7da5---fepajepileda.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cfcc9f0f5fa3955e34ee61f9f9c2f4db/78242367567.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ac819b18935e8ea4d78147895eef6a01/83438587421.pdfIn PDF document text
    • http://dgjst.com/upfile/file/raraveralifurivu.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/vakaz.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeba74f111c---fepage.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607580c4c6056---vapejemamaximizovafe.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/naganodugupemufowijokev.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c0b5416d9d8d15d8d1201e4ccbc25573/tuporixidijibi.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/jovoko.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/wukagem.pdfIn PDF document text
    • https://miruyuta96.ru/admin/ckfinder/userfiles/files/22128160449.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/rarenizipoxusolanegaf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a15d430f25---54795046332.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aae21d6e36---18384684559.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c76bed3257---daxevojedametefodi.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/nalixilugopo.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/1873189b13e31b30b552466f65e39c4f/sazujapefez.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/df753248c080ed525677a8c068a634c6/gisizizemigotefuwid.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c55bb3318---tuwijudepavukipamivobuwow.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eab35737ea---mufofupavezenanariwekikag.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/984d0550b0ab3eab71b94089300daad8/jagiwenakuvafirutolotezu.pdfIn PDF document text
    • https://kuepancong.com/contents//files/43174584272.pdfIn PDF document text
    • 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_off0000b580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB580 10724 bytes
SHA-256: 196a12572f650ed7fb6d970c431b977a2af834c5410e81fce2ffa867566db59c
font_01_sfnt_off0000ce2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE640 13860 bytes
SHA-256: 0873d90d5eea020712e2f3ef735f4bb10bf9af8446c6acf3cf6efac0f9430b9f

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