Malicious PDF — malware analysis report

Static analysis result for SHA-256 417bf9a01db95de3…

MALICIOUS

PDF

77.9 KB Created: 2021-09-02 18:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8125a697d3ea9475f2488053569846f1 SHA-1: ee0160563b2144c2cd222f658c931be03a8f8a55 SHA-256: 417bf9a01db95de3f245a6dca97f56aacebd878f37f8d34890b302073bc55d5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and numerous outbound links point to a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://eyetracking.pl/userfiles/file/12498866282.pdf In PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610fe3cc20056---lumogozad.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///32780124348.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/309bbf4168ff3f86160c0e36535e251f/86073088120.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cag19lpckniplsv9nrnq4942i5/52047213588.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/12108600610.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/41454139645.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/26318183623.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d02e774436---pegidik.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/dvsp6hmi3ja8dekoqbvfjmol9c/1639340594.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/9718745778.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/dc17beec811182eb49f222fbb3b16c12/gipoguzigikotobob.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c965f9bbdf---32820088532.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/3039417632.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/7f18a8cccbe1eba07b645f01eae862ba/92504082782.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6e4f60d15---gujigop.pdfIn PDF document text
    • http://exima.kr/userData/board/file/17062205252.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nejuxaja.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e98bb78d---gomamev.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/149ab1992af1e8d7e98d3f4a78ddf5cf/walivuk.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609b75f83f5f8---21748915000.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/6560820701.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/37548522800.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/litewadidodevifebun.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/56841536387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=samsung+washing+machine+10kg+manualPDF 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_off0000ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9B 10888 bytes
SHA-256: 8b7a3375b338bfeac60307161ad31bb55aaee80a0a669c563d4c8ea3c1122856
font_01_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 17928 bytes
SHA-256: 2afb94b71fdb3211e143e7e65fd3ef6d6e5a7fe61dd72fa241fc653eadc62c49
font_02_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1