Malicious PDF — malware analysis report

Static analysis result for SHA-256 5419daf6421382dc…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 10:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f15a8037b981793bf76c60e5644028a9 SHA-1: a153e01db24226ee2da74cc2a5150722b83196de SHA-256: 5419daf6421382dcab5b28ad63f378ed95b07b31ed150b24d36673949fa2b4e0
134 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm with numerous URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://12shio5.com/contents/files/77017618546.pdf In PDF document text
    • http://coolscape.info/images/files/jekimafejowejufak.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/rvg6seka0ri591pn9un2952hcn/71301368055.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/defuw.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/sizosipazuxabufatujowitub.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/35311665556.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/juraseb.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/30858268204.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/wifix.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/lipavubetuwinu.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/98104280980.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/fuvavubelowif.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/85909795364.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f32944cbb---37637381618.pdfIn PDF document text
    • http://status.cz/UserFiles/File/96875151489.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/19055033871.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/71007068467.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/75806715521.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/wizojomimuzatijapewab.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/2459112494.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/wawivop.pdfIn PDF document text
    • https://polytex.de/sites/default/files/wapebazizo.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/14462576459.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=amazon+kindle+download+appPDF 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_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 10404 bytes
SHA-256: b5cf35f74938c4f982e1f89f90a41f1a69b0a1811e422c0b88171c0b58e55a4b
font_01_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 17748 bytes
SHA-256: 9e0317186246bb02c8a28db7cfdfee7fa1288df1c4fcf505647b10225fdc13ad
font_02_sfnt_off0001271a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.