Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47a99ac01e78e25…

MALICIOUS

PDF

86.6 KB Created: 2021-09-05 09:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 26ef08447447f0d4472785c0797aa65a SHA-1: d29acfd891b078c735ee105426f794928597f77f SHA-256: e47a99ac01e78e256e5d8613d89166fdfd15c50b23b7b8287c68fc36d58ffd5c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites and appear to form a link farm, a common tactic for SEO poisoning or phishing. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161142b9f1a013---zilifuxaf.pdf In PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94b876077---fevijod.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/mofoxazenef.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb7f8f1c29---33287166503.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a075d07b3b---60824095429.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36498531701.pdfIn PDF document text
    • http://yejida.com/userfiles/file/59049350311.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/nimikudinakigowazax.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/15565692735.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/gazewilidezaz.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a5583c99744a35acf7ea888c6d3c1ec/61038848068.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4db611e5c---jikago.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/49753959129.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/97726454201.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/69914668365.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/rp7vcb1quh3th5mvknag90vceb/vebotorezozonexez.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/t7n9uju4cid0j4msogjok4t1v7/nubitotulasugug.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/86749769572.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/59385553642.pdfIn PDF document text
    • http://kap-group.com/ckfinder/userfiles/files/49307333831.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68bf86a46---tidanapanimagesuvotojen.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/59390649448.pdfIn PDF document text
    • https://forumsevens.com/images/file/tegefowosan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=excel+to+pdf+vbaPDF 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_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 17520 bytes
SHA-256: 783f0e78a906565a896245df3233bc2263f60c4a5d8612ef6cfdfd22331d7cba
font_01_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352B 10440 bytes
SHA-256: 65abab729cd9bc0b9781e8f71015062e8166b6b542b1694ab34ee62d6846baf9

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