Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab78c338be9ebe8…

MALICIOUS

PDF

80.7 KB Created: 2021-10-04 11:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 636cc4425daf73f3710dfe1aa82901a8 SHA-1: 6bb9dc66b681238dbc7dd5971c475708cbe63db9 SHA-256: 1ab78c338be9ebe8db1a93503aff818fab25ccb1d86b7138b7dedea7368513a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple external URIs, including one pointing to a raw IP address, suggests the document is designed to redirect users to potentially malicious websites. The 'SE_URGENCY_LURE' heuristic further supports the phishing or malware download pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=for+any+enquiries PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428eaf0b6f4---14599039365.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/89429823893.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/26401371718.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021092015011138.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210917095635.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/15896797499.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/gozajo.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210907_234722.pdfPDF link annotation
    • https://iohrp.org/f_files/files/duvanagotakoxogigama.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/26956002927.pdfIn PDF document text
    • http://husplaza.hu/editor_up/dajegetojap.pdfIn PDF document text
    • https://www.sudicobank.com/ckfinder/userfiles/files/dudezivawonavotum.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/13728982687.pdfIn PDF document text
    • http://happy-land.hu/editor_up/34595670305.pdfIn PDF document text
    • https://blugarden.eu/file/47845533495.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/2797534578.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/37863900042.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/bigiwizosufipatug.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/xarewipekogudopopoxotawe.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210912005119667018vejw8wsr6zc7.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/82322549748.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/fujijufiwiw.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/tosogobobekuxemidutazo.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/21600023891.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_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 10292 bytes
SHA-256: 4cb03bee50cb920ecdab7aa9efccc6e834afc070483517a71f1781d96bbc2a74
font_01_sfnt_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 21132 bytes
SHA-256: 38dae900b0f3bb8bdf65517d6d248f6fc6468f799c871f80869769c1ffbfb44c