Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d6ccc8a0f87e49…

MALICIOUS

PDF

102.9 KB Created: 2021-07-21 01:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e079b87288c24065ead13d7625664555 SHA-1: eb419987b0b17dd8bd5e47230b86d83500b03b5a SHA-256: c5d6ccc8a0f87e49c3ed7f7d689f81a69d37506bed23ce5e5657aaf1c470f346
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/nufekidefumoxurej.pdf In PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/roxolinobikugifakaden.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fa2f222e---89546593843.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/wogogujogibaxemubexovalu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25jf719jta2pprl4crrvs36982/56158004742.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733bd50546d---68324639771.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/bumabilekudifedasifu.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/bekirajepisikizarokeremiw.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd6fc6952f---didizaxuwud.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/79481058959.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/jukiwunirufojosilafa.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/mazejedasikaxegededuk.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/7nap0j4aqkr8cpqqfas6pqspe6/basepodamizik.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d85ab8d361e98d7e962c6f8556b8454a/14153576340.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0be0e09476072a5502ac662df9c86d9d/56734786491.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c3d006142---61349898838.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/37062554309.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0d3b17d872cd2bcdf4a73270f3d68b14/70383106722.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3202c6d4a1---kedojonudajagekomotezu.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/93612156274.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c1b2fc4a859ca98a3576ed906776f80c/metiguwulotane.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a30ee6d8be7---perinol.pdfIn PDF document text
    • http://accronline.com/userfiles/file/xutibavozigesubo.pdfIn PDF document text
    • http://technocom.pl/editor/file/sivaxi.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/21607666159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=canelo+saunders+timePDF 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_off00012cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000144da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DA 19080 bytes
SHA-256: afe3003922d1618761bbf1b21f75617cb5e0a2137b5f4f059b761415e51e1cf3
font_02_sfnt_off00017685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17685 10540 bytes
SHA-256: db16b5fb448dc94e988f89242e465edf0d34c6a8f0717e67abeb1420aea55293