Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29c6d4924af50bd…

MALICIOUS

PDF

82.2 KB Created: 2021-08-25 01:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a65255a78e53cbf7ea6bb8f7b336e888 SHA-1: cacc8bee1e88adabdf1abbfe935ea1cf1e691c6e SHA-256: e29c6d4924af50bdb92402e8c63d7633b341b527779bd6dd97fe9003eff39c6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various websites, several of which are hosted on compromised CMS platforms, suggesting an attempt to lure users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cd87aa64e5ee9a93f307fd6546416991/bedukitojopixusetavufiw.pdf In PDF document text
    • http://a-swiss.com/upload/userfiles/file/fovizegoli.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f7941d394a7---49286738015.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd79835d29b---57557871606.pdfIn PDF document text
    • http://e-hane.com/files/85254017251.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/27995726088.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/45400728477.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/30927990521.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3b981095daf63cad2726065a0f386a48/37094810621.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210626_82E4A78FB8D8A71D.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/roledujejimijowoxebimix.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/74501711356.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/mogofitibipokizopanuzar.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/faron.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/wowutikubovivununi.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/552735880acbeb71b151a7fd065bda1e/zubonewomin.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/zitunoze.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff840b7b97---33171609555.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/nenumijuripezifadala.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d408b748d---busesadumumupoli.pdfIn PDF document text
    • https://topaldanang.com/uploads/image/files/16153265467.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/70816626009.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/17507855284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=volume+given+mass+and+densityPDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/samajewipiwega.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_off0000db8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 17396 bytes
SHA-256: 0b508ee8b809cbc0c86551cbdd7a71ccc0d522c9352834b8223bee44c21639f4
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 10740 bytes
SHA-256: dc74b39f3ad67be2c6fa3df4b5fd002e297922aeafde441bf6efe78fca9db955
font_02_sfnt_off000121b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1