Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdae9430bd43f25…

MALICIOUS

PDF

99.6 KB Created: 2021-09-07 07:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 55e5f210346e2bc810b47d5952740329 SHA-1: 1d06a8c4a2f0f1287b494dcff2e52cfc1ee94c86 SHA-256: 0fdae9430bd43f25fc108cd05d76c8530cfacff2835706ae189e7e6d3f328e2c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The presence of JavaScript suggests an attempt to execute code, likely to download a second-stage payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://philabc.ru/uplcv?utm_term=demarrage+moteur+etoile+triangle+pdf PDF link annotation
    • http://kbchina.de/upload/61136860509.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a16cffc361bd33e0232a4ad8c6bc0aca/jakifirulumel.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/70454818386.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/44469053f0f4da65d112ae7f977527ad/baduga.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/kenefaxumebizisanu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160853c9d6f50c---10681789454.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ef4778df9---romevolofonigesutu.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/8219332605.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/97623610135.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/jarasarozanu.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/notujisasonir.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/73828309628.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/54972399255.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/32633a737de5946c0e18fcf1856cb4ea/fomubojerutupinu.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/66774601088.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/86027750504.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/68574976571.pdfIn PDF document text
    • http://aweibel.com/Photo/file/25441663415.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/pigivedeno.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710ddf21f5b---3650959403.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/41843132268.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611d1150e2678---77068915024.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/kivegovowobav.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/21072915270633646715ov116ay3ft.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986e44bb292---lefipefafal.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/xoroworomubizuzolafo.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_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F30 21744 bytes
SHA-256: d805739dc05bb165aeea059225ffe4cc95dd40fb6ba1c7a06f03c2ee701d918c
font_02_sfnt_off00016813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16813 10772 bytes
SHA-256: 1aa59322f8bdb681d2759f4654636a9f095c5c51cadbff2eb82650f111ee71a4

Open this report in the interactive analyzer, or submit your own file for analysis.