Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabca33471b9e430…

MALICIOUS

PDF

79.2 KB Created: 2021-08-14 11:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2d3cddd97cf18302a5eee09e92736067 SHA-1: 85fa376b5c48e8cd2c7a0d5ac4414c99797bcd45 SHA-256: dabca33471b9e430c1e8c9e159e89e54f4eb9193d82613d4e5e085b76800d1fe
164 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external sites, with a high ML score and ClamAV detection confirming malicious intent. The presence of a 'download button' lure further suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bfo-walkforhope.com/clients/e/eb/ebd0efab9cd97e953e90891d9eec7aad/File/bulanik.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/fbf4135705926ceeb312303ecc14426e/kigemibobiwolobifir.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808b0fb52e0---32043378003.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/nojenaborizogu.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/24741447978.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074b265cc61a---25589636127.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/95606319155.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d71841b53a36262e0f70427bd0c331fa/kedemokuvisotimunipes.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/kedomajemepukev.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/7283635101d20fbc8829acca84cd515a/61545246231.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071af36ae17d---sadevinilus.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/36436574423.pdfIn PDF document text
    • http://monkeytailranchdonation.org/clients/e/e8/e82116dd0b5861b0917add2a69208af2/File/gaxaruxewuxapusakakusidi.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/55337465693.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/a0fe57882bec441821823428a5c37ae0/72866664314.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/vunona.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210609020050.pdfIn PDF document text
    • http://stfrancisfrankford.com/clients/9/90/9051900d87e3fdd5bc97eff612ac54c4/File/zopusuralepu.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/momo83gfkt7gq6e63q85ncia1q/radafatese.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/35935716097.pdfIn PDF document text
    • https://nevisnews.com/userfiles/dabivujiteli.pdfIn PDF document text
    • https://destockbaby.com/ckfinder/userfiles/files/xopaseriribixexopesugi.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/5285157093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=naruto+ultimate+ninja+storm+apkPDF 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_off0000d422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD422 10712 bytes
SHA-256: f82b1cf609ee6369b2aeffb7867cb4281b525f82e0bd198dd6454f4740f63a43
font_01_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 16768 bytes
SHA-256: 9144f8ad2c396b9648ccb52d75e8a7742a49e99d6f10477b21910bf4ab89cd59
font_02_sfnt_off000117c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1