Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b6c745c2388f93…

MALICIOUS

PDF

83.1 KB Created: 2021-09-12 03:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a258c94bcf5643d58a74e32d553953cb SHA-1: 9f173d3f7aa5b77cd93f3391cb30a3844ee295a8 SHA-256: 60b6c745c2388f93f727b4d89db79f42ddea20d16b09e025faf425d429bc0f50
182 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URLs, indicating an attempt to download a payload. The heuristics for a password-protected archive lure and a visual download button strongly suggest a phishing or social engineering attack. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=how+to+get+in+android+phone+without+password PDF link annotation
    • http://zbigniewrodak.pl/galeria/file/46171788328.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ng2etqvqk42o27n1g7s8an9mis/75024294978.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/11051729074.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/lopanosuw.pdfIn PDF document text
    • http://peoplefoster.com/pliki/ragoxopo.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/11584821823.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/kenazuzikov.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/refigotadiwumekavopuwa.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/10321597663.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/maran.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/98152574072.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/35758991477.pdfIn PDF document text
    • http://wdnederland.nl/file/zomemawexavagorizu.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buxepubivozaru.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/73734575996.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/zolowamarowemuxovu.pdfIn PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/11109572052.pdfIn PDF document text
    • https://tarsiman.ee/files/file/49396310945.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/dadoz.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/madadovugesivisoleroz.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1ac191137---75825234388.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/95664155834.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/71080315831.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/demoreruvadinenodowakid.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/93479177658.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/59438483422.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_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 16840 bytes
SHA-256: 42e87de3ce6981af091f473860440f49cdfc509f5d12432e7a2456ac1461f8fa
font_02_sfnt_off000125ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AD 10800 bytes
SHA-256: 29a800d3ef58eb14451f891d4dadf6719c9a68d79cf73eb460ed33e6a6fdab30

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