Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9087c112252fe1c…

MALICIOUS

PDF

88.3 KB Created: 2021-06-30 09:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ec07cb1db5041c521986bffa4cc09532 SHA-1: d758d70be6f0be940879003dde88ff250067a922 SHA-256: d9087c112252fe1c720a93d4d72516680a8b77a3aa4212f9c7f597d15591bf88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV heuristic also flags this as a 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the extensive use of external links points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0242

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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 http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7faae5f9---tinofulesofuguji.pdf In PDF document text
    • http://aelma.com/sites/default/userfiles/file/31060111230.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/q3b8ggttf45kb8jqgphevs59r0/63291347436.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/46988044665.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/14171789139.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/kukatuxetesuxuzeliwef.pdfIn PDF document text
    • http://charivne.info/images/file/895634435.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3tbm48t071ovjrfln9ulccev5g/gifamumukadexixiv.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/f4d6vjfquqkhoi7ld8vikb8eo6/folubaxopusix.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e238947fc---6395329461.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a147f0a6fd4---33666112648.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/dififivelonujofa.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/9f69f0f74938381cc9ecddd85f08e739/fujufil.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1a34ae97b---potejofogijemus.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f41fea6a150993eff4dfb88214c7926f/rogejat.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/31701756387.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/kunodofowomirogisazufi.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/wugudetodonazolisisapived.pdfIn PDF document text
    • https://soechi.net/userfiles/file/61457566688.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00922c3b9b---xesiwaxawo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160982e629a611---rofubizesekorusam.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/993e6379ccbf6f13a92d4e929bbbd65e/98677535782.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/temezinetatirotar.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/50868630189.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c164a5d14---5898496397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=hack+insta+with+kaliPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 16436 bytes
SHA-256: c37178892c861234b5c43daa3867ea72067c18b8f03b9054c919e3ea65bc529a
font_02_sfnt_off00011931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 17012 bytes
SHA-256: f19f308e28a6323daa018f965c954862a793db4b9f26cb4f928b516a53bf58d4
font_03_sfnt_off000145cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CF 10144 bytes
SHA-256: bf0e8684fbbf8f269ff4bd0fb7e0bfbd7dbbe94cee917740165418aeba7aec5f

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