Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eaadf9524c8a799…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 01:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84f6880c02da53f0345b8231e0bc0ff1 SHA-1: 0a894d177c5f22491e56d460d7261b85a45c1b74 SHA-256: 9eaadf9524c8a799bb1f4f9378accd03e6f14b68c84a436d589b79e71d583c75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and a link farm structure strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://nmg.lv/img/uploads/files/morixanusaf.pdf In PDF document text
    • https://zniczekowalczyk.com/user_images/file/36730349813.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cec1671f4a---75283694989.pdfIn PDF document text
    • http://mmt24.ru/files/file/leweferabuzubaxi.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/22136028610.pdfIn PDF document text
    • http://chineseclothingonline.net/File/86965745849.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/12012059111.pdfIn PDF document text
    • https://yallaformation.com/uploads/files/luzizezadufolelotu.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/epu5cc8njauaanloeinv3qpgke/73137772313.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/85700625449.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/47627135871.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d2034c89e---savitewunukusa.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/27780357558.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/18230272329.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/parefonosurawanen.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/9062817549.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/fakizirukugivulediveraj.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/38903737752.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/c76a0e2f51d904cf3ac1d25e04fe1ecb/welitedowetuzopebagaxigex.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/36f44a36ad4e3ceef521c4aa153af1ab/wakazaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=new+jersey+motor+vehicle+manualPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/404fd0ee94365edf35b3bbb15ebae562/77752000055.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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 17192 bytes
SHA-256: 4e5c1105d1bf92bf7b622a16b5b675e49488e838ce0708a6dd56d8210075630e
font_02_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 10968 bytes
SHA-256: c09c78163227cba00cf6e7bcbe7a982a46a9da5249136a8ca2e5582229e3d91a