Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eefc14e266add0f…

MALICIOUS

PDF

91.1 KB Created: 2021-08-11 00:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae55d4954cf58fe8e885929602b8e040 SHA-1: 5db9ed3a78513e7449589cd81d54d295c0ada8e2 SHA-256: 3eefc14e266add0f731d280084a343176c9a222898b7d458e865369dd97ceaf7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF that contains an embedded JavaScript stream. It also features a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1c1c83624e6629c2b4a075237ccbdce1/59931111873.pdf In PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5ba99f61e63948076f23d9a18566491d/41630574988.pdfIn PDF document text
    • http://i-physiology.ru/upload/finanawakigek.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/c007a945343c275ee3f6a5c14db9f9c9/3495974566.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/6638054760.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/8466589290.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f704b1a3---2365201466.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/86496521345.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/2fde1fc0a2af4f8309b1e1e9936e6c52/xinebusufabevu.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/6907881490.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/33f15e3232aeb70d6f174aa9afe91b71/94451740933.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610817047766b---jipugagujijaxagex.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b6e45ae8---kokelesa.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca981ee223---refufobenisen.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9424c9d9a790e53b548be21d88bde2fc/mazufesi.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/n8c9caj5khppd6vcr6ohobjtb0/zexuw.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/30245711864.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/57714560880.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160983400a47b1---sanakunav.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1fdaf15f8183dd13fbfd42bc7ff8964e/61012490483.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/zazifagiwegekov.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/c5ni4fm4vmmcnl3nvjd0s47kg7/80757172263.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/21572749862.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/b3rhv30rteal6r9r470ujhlp8t/99127915829.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=to+kill+a+mockingbird+part+1+socratic+seminar+answersPDF 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_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001170e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170E 16808 bytes
SHA-256: 979a102d6bc38f5a18854a6bd4d4fa5ac87f3a2cfda8712520c7afc8a33d92ec
font_02_sfnt_off00014255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14255 11188 bytes
SHA-256: 8eedda27bf315be4c3a7fe0076b3f514ac6450328f817b95fbb8c9aef470f942