Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c5a3d775a59fcf…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 03:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e49e17324949c46e00e7df065c69bc38 SHA-1: ad2eeec03bd8f1a33d7252189fb5c75cc6b0898d SHA-256: 62c5a3d775a59fcf144bdc13941e3f97d33e6fc98fc820c47172433e435e8ea0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to obscure the final destination and potentially track user engagement with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d3cb04e9bfb---98502084401.pdf In PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/dinalebilezutavop.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/97289415950.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161247108134d9---95274210052.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a404c6b7303---nugejuwisujadin.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0e90eb47ae1bfb896a54f2012d2c49aa/ziwejewuvag.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/70553120535.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/wipixem.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8974e98383---dojobulirekitegafukaluwo.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/loxejafopuwola.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/wejomepukeva.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/25407526882.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/todofojelonefajep.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161036d7591ea5---23051403482.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b7dca918e---paxuseniruzozakulomudos.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/zazunuduve.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/semarifigotegipobeb.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/d1178dc4467bad253a729a60ad8f9805/56247283129.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160748e185d0d4---90518656355.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/11692965206.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/omjhe84gs454ctgltqkt3ps7kv/76670436561.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/tepoveluxikilizitivavusuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=active+payer+listPDF 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_off0000d6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C6 17328 bytes
SHA-256: e21c9b80bf8fb31d8c006334fd1c6586fbd957fd7f8542280379f23bae19adb7
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3D 10304 bytes
SHA-256: b135add04dfb1d44e0347f5403ab2b30b3700276462bfa852a384e638f87de9a

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