Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf68dd73c189fde…

MALICIOUS

PDF

83.5 KB Created: 2021-09-14 03:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c37d849483e49bc5ff4f330ef3195d0d SHA-1: 6ce2d740e587420721ee9d6b34dfabfa1b68c38f SHA-256: adf68dd73c189fde4c4f433364a17325daf92e6b3b5acd090582b459330ba91a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to multiple distinct, potentially disposable hosts. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/uguqaqf47f8kc3c4qs4r8ulvum/41136573063.pdf In PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/nirer.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/35693691593.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/39894164999.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/38838341806.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/91980985051.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/aef30cea1d5332de737d1b649eed50a4/xifazutewebejipawetido.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-7/20210907181857162297.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/23949479992.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/82773249825.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/59690060621.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/45607205263.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/47427588568.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/bebedeja.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/xodepijibogeritelipevake.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/mekiven.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/67580694353.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/sazajeramaxewog.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210901125008.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109060057221650.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/febewonuvokefugotaj.pdfIn PDF document text
    • http://jadeite.ru/images/file/negofofitinanisedipazonum.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/2289588814.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/79599246001.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/kasububi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ruby+rare+candy+codePDF 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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 17764 bytes
SHA-256: 4549554e9ddab3f9e13fe4384829a593c1be6e50f5182fc43f2c3ea565af211d
font_01_sfnt_off000110a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 10356 bytes
SHA-256: bd68cf1786631f6bcf08ed536b96033123939dedcd5b48bc17fe55bf2fe32a69
font_02_sfnt_off0001282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1