Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbedb2a91db0e4f…

MALICIOUS

PDF

76.0 KB Created: 2021-09-10 09:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a5aad80bd18623d5b7400dafdcb0d458 SHA-1: 60c7ed25e7970b2794a26bc9e28c622cbdc91e11 SHA-256: 2dbedb2a91db0e4fa497dafca2edfed23d8db59dca791af523434c0acb26a7b6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The document's structure and numerous external links suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://kenadong.com/contents/files/gevotuvax.pdf In PDF document text
    • http://3bbb.fr/ckeditor/upload/files/76115773490.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/96730570459.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/70776089041.pdfIn PDF document text
    • http://nut-shell.net/upload/files/puzomajafusurezifi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa4fb1594c---bawow.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b9b8378fe9e774d2dd7b8e08977d075b/89646347928.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/vanuzilesas.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/sugafelugalupiwi.pdfIn PDF document text
    • https://iohrp.org/f_files/files/miribabepowop.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/5278192748.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356ece7c245---weboxilobasexazelixovemud.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/43474574176.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/dupoboripadak.pdfIn PDF document text
    • http://taigesw.com/upload/files/puwuketexitazekirarawe.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16134da6d9d85e---zedajurus.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/bumilisip.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161332d9e3e53c---lumizovevuxabafiso.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad2b18dfa8---gepuvokubid.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/guxoworakoget.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/84799863293.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/pokukarosirugizafazuda.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/50800822139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=euro+train+simulator+apk+modPDF 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_off0000c4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 17448 bytes
SHA-256: 7b758eb39ffb94c50777b7127815c19912673083a4455768f273dc5f4ddb22ba
font_02_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 10596 bytes
SHA-256: af1601431617516560d4c68915f581373025413cc8c1629429df274b1b03e363

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