Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6e9d0a9e5e86ca…

MALICIOUS

PDF

73.7 KB Created: 2021-09-01 02:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e7231751159d3ea849e2f2773236956 SHA-1: ee1cfa73d40909adfee4b366d38d10fce23f90dc SHA-256: 9b6e9d0a9e5e86ca4bc95adecbf3edc0f85c70588f4558704f30a4a863a6e2b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/h7n3k3s4tff3g3difupkr96nm3/84254634508.pdf In PDF document text
    • https://ladangmimpi.com/contents//files/xupuruluzobafe.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16290941799132.pdfIn PDF document text
    • http://halaljones.com/uploads/files/rinivedukipoxaduvogari.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3d9f9eb3b---wusatovuwiwifuv.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/24303234637.pdfIn PDF document text
    • http://abwva.com/uploads/files/39317015813.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/49177467311.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612340d0b51da---45707288095.pdfIn PDF document text
    • http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/15575280924.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/40949345119.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/48836963740.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/lewimulu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ead17d7748f258da8247df5f7f49c19d/22848758248.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e42db0718b75493cc3fe290424c25b55/gabufunuvugamezalaw.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/verazaxadomosawegabom.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/52127311348.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/dedagozetixugomolem.pdfIn PDF document text
    • http://bocghebinhduong.com/media/ftp/file/duzad.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/rijejikorivavisipepal.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/18467777170.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/99887719329.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/83042367435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=race+2+movie+song+mp3+downloadPDF 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_off0000bdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCD 15668 bytes
SHA-256: 665341dddbace03307c86018080342a9df0ecfca2921b321c3770c85fc459da6
font_01_sfnt_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 11148 bytes
SHA-256: 271a8422de455bc781ae719187bc33414cb6e5038358e33ff359675d7d0c67b1

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