Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba70855eafd89467…

MALICIOUS

PDF

80.6 KB Created: 2021-09-09 01:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9035fdc4865eafb63b72d6ccb25faeea SHA-1: 5864b86d36f7b02b5d7e434abba2c3aaeb740e8e SHA-256: ba70855eafd89467ab6e3cdd8289c7e13df306daed5b4d92b4fcf28a491473fd
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=green+screen+by+do+ink+android PDF link annotation
    • http://theurbanbazzaar.com/userfiles/file/motaxalesagefoganavobuw.pdfIn PDF document text
    • http://elitacasa.it/images/file/dokifekux.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/sobinigamanur.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/77804820972.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/fewiwifimewevowobi.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/gigepezunukapuwaxetipo.pdfIn PDF document text
    • https://camphacement.vn/upload/files/tebijuzalokomurapajow.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/93a055a2bed8a20e9f88a67399101ae3/nezorerimujudato.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/66584938877.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/jozunemava.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/46485344342.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/fuxusuji.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/sotavosigejafoka.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/48847385249.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613133ec082c3---32515546258.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/75960923299.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/31796993303.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/85269132950.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/1648907690.pdfIn PDF document text
    • https://alohasafaris.com/files/7425034810.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/sefumobo.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_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8B 19040 bytes
SHA-256: ed8165efb57d2ca952c3ba03f4aab44e25db37e53869c06f6bd4ae98e0431757
font_02_sfnt_off00011cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF9 10604 bytes
SHA-256: 80048a6fecd3f109e2917be19d9baa0b4d8f77d9180435d430bb823a31586ab8