Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e684f1c72359605…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 15:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 768719e170943059b6586198b6b9f94f SHA-1: da8648e45e85b13db3fc1c41df1f6b3ee15af072 SHA-256: 2e684f1c72359605efe2e2883e1d546c9df2b3873a0ed1423b22e18fbbbd7061
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing trojan, with a high ML score and ClamAV detection. The heuristics indicate that the PDF contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://www.evisiontiendaonline.com/ckfinder/userfiles/files/50259030817.pdf In PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/32766568187.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b21d2b2c1---fokazigup.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/37315288907.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/jinavolaj.pdfIn PDF document text
    • http://huntland.hu/upload/file/49389852933.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/kixux.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/rejefemuf.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/fofoziboxixamo.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/24786189346.pdfIn PDF document text
    • https://ptogel1.com/contents/files/77048798063.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/tikakozebewub.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/nugebu.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1adcada60---pawexigovopowone.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612e990cd0170---rofasetewudejesow.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/96994665754.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/59525056699.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130724ad73b1---97152722774.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/sokaw.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/29037068694.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/kewoduzil.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/99479498339.pdfIn PDF document text
    • https://happyfun.tw/uploads/files/202109111409434764.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/99511301379.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/2407546576136bd1c84362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=free+movies+download+onlinePDF 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_off0000dd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AE 10440 bytes
SHA-256: bdee8a89019b5797c6d06b0a7cecea013f3fe3a05d3c0d3d230327b2e0277bfa
font_02_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 16556 bytes
SHA-256: 563bae97fc7d1fbe6e963fca8341bd148394dd396670b1d75e765728f23a24a2

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