Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea622a234540767…

MALICIOUS

PDF

110.9 KB Created: 2021-08-07 04:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 539370633ae526527d396b866e24f1af SHA-1: 61d3d47d7a896cc4c356834bd3e820fdd5bb14bc SHA-256: 5ea622a2345407675b04653656eac22bfa0f8f9cbf99f4539d9ffd3009eb24d5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing or malware distribution lure. The document contains a link farm pointing to numerous other PDF files hosted on compromised websites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of multiple external links and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4571ce36c---ludaporegokomupej.pdf In PDF document text
    • https://flardochform.se/userfiles/file/wirapukuwipetokutodexezet.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/73241368981.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/jokuwuxarorolami.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/72098071636.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68f39b1ed---notuxejojobevab.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/33992477385.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7756b3ec7b0cf63683dc0f5281e21168/94669702915.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/10350050687.pdfIn PDF document text
    • http://inse.us/uploads/images//files/kaxozegasezokepowopegoja.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/vunetupetowebikovizade.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/zamadojirusebinuvazunuteb.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/1131302596.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/66181755116.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcd60f925a4---34628103797.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/34967269900.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a75cb49b0f---3090460243.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/98e871e04788d547b1ddcdf5ae0fb8dc/zafepakexifik.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/38608509149.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/rutilixogebo.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/tajupixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=reactivo+limite+y+en+exceso+ejemplosPDF 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_off00014abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000162d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D1 18620 bytes
SHA-256: c17e45778eaf000bd7b78cf36816390e3a2c13dddbc2296b388895cf2cb36cdf
font_02_sfnt_off00019247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19247 10892 bytes
SHA-256: 725a7b2dd11cb65fc9bf2f71357a7db96890146909fe62605a363c5c620194b8

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