Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c59b032ffbf79b…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 06:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66bcb325a01888b258511a692c1d3a02 SHA-1: f9e4a0d59d392302a801ab3a553b11fcbd9ecf69 SHA-256: e2c59b032ffbf79bf65674f2dd34fff343d655676ca24efb9d6ceb9411abaded
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a phishing campaign, likely attempting to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/344bdec5f76ff84425451de1142ba595/17942617596.pdf In PDF document text
    • http://brkvinc.com/userfiles/file/suwunedafudedimedavomij.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/sogatakorije.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473fba8987---vimewabitadajira.pdfIn PDF document text
    • https://tadimtursu.com/image/files/76524721866.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607118323fd46---16385008476.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b20fb0b071a---jopididogi.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/mileboratepizemupewaxik.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/293da426b0cd4d031fd0009621d4bbd0/sobivesilafomuzewil.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/25596735978.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/37720947428.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/matib.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/65813988051.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/kedusolosubazugaf.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/wuliniputazopav.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/90990146299.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/81669812758.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c90a7710c367ef3817676d1c00383e80/97886347173.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a6836285ed66717129e3e4b7dda55db7/kerovasevawujikexuvu.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/g9j2ptghs5ul2qb953j721l7k6/jolugezomuvi.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/50560252434.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/mirigurak.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/patukanupugukup.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/kapuferujemodifok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=lyophilization+sp+scientific+pdfPDF 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_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 18156 bytes
SHA-256: 54474ba1997dfd1fc2059c971b91cf73b39474b8384eafc2959cca6e728cc066
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 10748 bytes
SHA-256: e992d0a7ea1b3f89f365e24290ee6390cc549024918edb815c3e217621f8cc8d
font_02_sfnt_off000113aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1