Malicious PDF — malware analysis report

Static analysis result for SHA-256 f351a83496e0dacb…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 12:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cea6e4bf40f6eab50b64bb2a1b864b0d SHA-1: 56a1a565597fd3ac17a8eceb37f91c6d3b134f8b SHA-256: f351a83496e0dacb57a5cb074f34d52d52fec94c94afd0aa46ab3967df7ac79f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is detected as a phishing trojan by ClamAV. It contains numerous links pointing to compromised websites, specifically targeting WordPress upload directories, which host further PDF files. These linked PDFs are likely designed to deceive users into providing sensitive information or downloading additional malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • 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
  • 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://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b07591681b---lolubumevet.pdf In PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/iva2qkqldv9o9cqhutsgcaql3j/wakawamuxonijisukijut.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e363de684---91056078867.pdfIn PDF document text
    • https://deepex.hu/hirek/files/zukukitomapabu.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/53849504951.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/lgrmnbl6c0ah98iqd9htfs532p/mejidotegagem.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/0d8cf0436fa64d614f0081cec241dab4/bofitekekurimoseranubema.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/0c5470bc6d9260fdeed233d2203e3bf4/35438153748.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/48888364265.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/li7e0thvb3t39j2qvgqc5q96lp/dukeru.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/xebutake.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/30615943988.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610a04857a1c1---60862587280.pdfIn PDF document text
    • http://airlineclassof66reunion.com/clients/c/cb/cb51827d251551eca15067b3b23580a4/File/56205468887.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f73c4706ff---levuxigisad.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9c26bf06e0d9dc6d884637dedc275986/lutonegewolepopiwaga.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/5006392796.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/fofitijozofupulud.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/fuwulajowininelomixerebus.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdfa1475db---51369731831.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/82091266069.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1dcbbb83f4b87d06d046f7b1978dc2e/82825729670.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219258badf---fitasipawi.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c918b366219c7a837ad7c5e22906714c/watawomotixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=axis+bank+my+zone+credit+card+application+form+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF422 18184 bytes
SHA-256: bbc2b5c89edcd056f3c6d7d16147f89d740fae31a076a05e3db4876bb111415d
font_01_sfnt_off00012359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12359 11272 bytes
SHA-256: b5f165de6aaa67ef8e1f7110f6ae030bda780f4868bec4941bea3379b52090a2