Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee49e1039d403778…

MALICIOUS

PDF

77.1 KB Created: 2021-10-06 20:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7cc73cad1345ded20d52c3af73f5a9f4 SHA-1: 5aec8d77bcdec995cd6e1e2e62cee139460678b7 SHA-256: ee49e1039d4037782de1ad4f64a99f598eebb5a72ec7c7a32ece132a86c1a29b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns strongly suggest it's used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://irastuff.com/admin/ckfinder/uploads/files/71938318199.pdf In PDF document text
    • http://atel-j.nl/uploads/files/494230967.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/16842725838.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/pakerosi.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/popalizonofubukuvamubem.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/muwewe.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/xijixulekalezib.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/69082658762.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/vuxuxujuzajugilajejekopij.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/01052802247.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe62d26154---netexesozomovejolarot.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/29olg85qt3o5faekbp3qt4e0mu/3730843969.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/42700189831.pdfIn PDF document text
    • http://iknow.pl/files/file/49776837137.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/kijide.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210920035943.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/71602422656.pdfIn PDF document text
    • http://citty.org/images/uploads/file/88748429303.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/ralibitawizasolasubajuwa.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/xafolebigifowa.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/70938280347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bacterial+skin+infections+in+the+elderlyPDF 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_off0000c6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EB 10832 bytes
SHA-256: 0ea4daf5a7056c1761902b2d1e84f9e9e1c3d5d7d5fc9a34ff6dcd2eb458a720
font_01_sfnt_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 17912 bytes
SHA-256: 822f6be6f5234f11d4208efbb2a5ba18b5ccfb827171d55de7296e35e88f8ca7

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