Malicious PDF — malware analysis report

Static analysis result for SHA-256 047df968cafb629f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 17:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 42b759a07734b57fb97fc7e15123bb6e SHA-1: 2312f42659be4b06a68846b213cedbc2146a1674 SHA-256: 047df968cafb629f0b187742eee6ad6062d2bb8945a633d34ca46790836ca116
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and functions as a link farm, directing users to various URLs hosted on compromised WordPress sites and disposable domains. The primary purpose appears to be phishing or redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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://i-tos.com/userData/board/file/jusosazuvetu.pdf In PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/34416105401.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d35dc7a743c1d9c483ceedc33dfd0c40/fifoxune.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cb654ba12---tofisupizevapodogunibute.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/kufasivatut.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/657e2a184ba928fb3ee6b133eab31407/fosapidabowegozewudison.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021042821520762.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/2a2e2aabc293786b133c3fd40007c7ea/60484136554.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/83439775813.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/donoxotukudel.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/lofosabitudab.pdfIn PDF document text
    • https://badoza.net/userfiles/file/jivogotisuxerodeniwupiro.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/87953585991.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/renuv.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/76effec0cf848b9690abd5b70f106b8c/bivakawezoxulenoj.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nt3kk3q60oeju2v49skntjql9b/sewaxerem.pdfIn PDF document text
    • http://shesob.com/file/files/gasixepo.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/muvafupewat.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/ok3mk5pmacggla25lr9o81tks1/xanepipuluzedejaguv.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/xunajineditorulivego.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/12ad9a96e5e5a1d2d5c7fb14a94a9a9f/zafevonofog.pdfIn PDF document text
    • https://wrd13.com/force/file/zudetemugulukudapadukasez.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/53404014829.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add4301315a---jisesawagidoguzosop.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/29907564106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+pdf+comparePDF 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_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 17676 bytes
SHA-256: fef41e424a62659e35d629581b551f4f2b2ce8946b312fa1ac5f6b9186105ed2
font_01_sfnt_off00010d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 10448 bytes
SHA-256: 0380ef7c26b4c36b778e165ea40a11817abfc4f7f634dab4b5f5f06e99b3da2c
font_02_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1