Malicious PDF — malware analysis report

Static analysis result for SHA-256 700924269152fbf3…

MALICIOUS

PDF

102.8 KB Created: 2021-09-08 09:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 206461eb58cb8ca2e0950bf1568c5834 SHA-1: 120fc6bea2526be4317368d6b14344b07af256ed SHA-256: 700924269152fbf3d8ec1eba2df1125c2d0990664b25740fa83227f61a0cb2ea
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external links, many of which point to compromised websites hosting further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://southtours.com/wp-content/plugins/super-forms/uploads/php/files/acog57r1m5thgki0cnc72ghb7o/67421623450.pdf In PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/9bk9aug1182teth4cdkbpsbuu3/45262511939.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/ludefuzakagezanufoso.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5700f868---gokizexudunawoxosigoziju.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/bufujezisonexej.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/dejobapirudodosusokovuj.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/763a872bf20073559d3c2e5e3c6fffde/31244498886.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/zemaninojejokepazakiduz.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/35285908473.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/cl0tkeds7bhdp6vho382ioe9c7/navamazuduja.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/drbhmhr33b8afhsen0oejhdb21/58452215797.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609daf7919392---muxivororu.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20215252021217789.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1b4700f92e439d312cafbf7202aa3ac2/16891604810.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf434347e1---niwovimusomusudade.pdfIn PDF document text
    • https://starbox.fr/img/files/buvazogobig.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35def7fce3---perupefafexosobates.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/kafefuper.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/64a09e798ce8f0a72665f4a0e9684af7/38440272200.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/28893259673.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d304a624fd---61497621745.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/durujedowiruzesoxodebaf.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/levebevufanusesefumoja.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021081822091453.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/18958042804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=digital+footprint+worksheetPDF 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_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 10816 bytes
SHA-256: d3804734fabb7adda03d4dfe2f576be9fe9671ef001afb50e1542ea9ab23fbf1
font_01_sfnt_off000145b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC5 18452 bytes
SHA-256: 8b98f04d2d9084c5074230d4bdab478d890a7a29624a6fe57b3487ba0bdddf66

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