Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60b26a5d8599680…

MALICIOUS

PDF

80.3 KB Created: 2021-09-24 05:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6224c137ab22cb868748184909a0adeb SHA-1: 781b4f880fc79a009193a92d728534a4e34ba664 SHA-256: e60b26a5d85996809b7653e3beac81103e4c615da24b25f77030900c688f6665
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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 https://infrive.ru/uplcv?utm_term=bootable+sd+card+apk+no+root PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd18259585---82775099027.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/kamim.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/95477821602.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/80325812126.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/80857406046.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/87825899092.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/pebapefokajojazefodaboda.pdfIn PDF document text
    • http://budka39.ru/files/54016711741.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/ganotofewipumalejetireku.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/84368662599.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/naxazadezijizorekusuvo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614340a021814---62299520549.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/57196369583.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/138944395.pdfIn PDF document text
    • http://hiniceshine.com/upload/92821808183.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/vujojulunikugo.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/42064484506.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/22124828084.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/mirukemakurutivagusuz.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/23606283152.pdfIn PDF document text
    • https://panama4d.com/contents/files/55612761861.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/63752948269.pdfIn PDF document text
    • http://toonesk.com/upload/11703327851.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109011334456762.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_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 17228 bytes
SHA-256: a49faa1a625599a3a99c4205d68435cff269c5f2c8b848f8d47ddcda2c638b62
font_02_sfnt_off00011b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B30 10700 bytes
SHA-256: 8683ba05fa4d2133597333b4acfcab2ddebd852c58c5f772a1fb698d574931f0