Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5f2b00bef5fd0d…

MALICIOUS

PDF

97.4 KB Created: 2021-08-08 00:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ebfe82db5680e72a178485795508fece SHA-1: 668dc7a42c53f33bb0144a9cf414db3d135ff711 SHA-256: 7e5f2b00bef5fd0decb43df9330a5b605ae388fbde93394e9cb03357ad8505c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=best+table+topics+toastmasters PDF link annotation
    • http://alituncer.com/userfiles/file/kojugeg.pdfIn PDF document text
    • https://wineart.online/userfiles/file/52502856505.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fa520fc7c31---51669249573.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/gevoma.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17c382b764---nanonerude.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a287414c5d7---94073250667.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///tepusuzidowu.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/90257685307.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607edef424ff6---rizefanixajewepetumomekof.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/2n5me17naeh1csot2qr03g5q4h/58242889258.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/faleziwowupufobubusum.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210720075214.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/78727549127.pdfIn PDF document text
    • https://tepihtrava.rs//files/85358552166.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1af2ac793a---tizaxilopurolimesobenezuf.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160795223320f7---varonuleropizufovetu.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/29749473506.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/5f7571fc915a623cd6f6caaf91adae94/mevudetafekolaraxufugeg.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/99216881605.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/03ad759553a44e111392f9334a8bfbc7/14351775392.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/5300b6d8759d97d832259d7b18302b5f/53678276157.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/narijedijebixoxobasu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfce8cb635---6878591255.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/kaposerazuxito.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/871356bb5ce18a80a92271d3a90221bf/parumojemobisajanap.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_off00011927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11927 10624 bytes
SHA-256: c6aad370757e668c35f2ad73871bf999f47aa42d47703a675cbb8eb05d2c3e21
font_01_sfnt_off00013145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13145 17252 bytes
SHA-256: 7b3e1b61c18bc68bce0adbe579f7b58ffcf0885e3020bf67c2d3295a200c2016
font_02_sfnt_off00015e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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