Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c2ad352252eae3…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 15:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 897ee45ad87d88b8a34996fb1e40a11f SHA-1: c3afca4a6cec70646ab058524fc86921f6e391b1 SHA-256: 26c2ad352252eae3063bb4e61fa147d7c208f897d6b78c3c11a6d5816dcdb8cb
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of embedded JavaScript and a lure to copy/paste content into a shell suggests an attempt to download and execute a secondary payload. The document body was unreadable, but the heuristics point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://a-pro-peau.fr/userfiles/file/33541716812.pdf In PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/sojot.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/41214229275.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/7500565226.pdfIn PDF document text
    • http://neteyes.eu/editor_up/88942573879.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/85852239253.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/13542369615.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161360ec78be86---22878926102.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/tisag.pdfIn PDF document text
    • http://budropol.de/Upload/file/taxikufaxawexagawuzegiga.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/72905510490.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/19777804783.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/gevasofimememanilori.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210909_4DB32EAADA7652F3.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/temiwiwofelarenuwe.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/reruvigoloxasiwujuleba.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/94090190417.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/mamodigepe.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/xugorinegoxif.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/o15bvmspd1rc465r835khhat70/fexurunutaxamisuwa.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/41195521256.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/jajutosekegonoxagizenixo.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/65888303252.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/31283250398.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/wejodit.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/53586734981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=dia+kannada+movie+download+torrentPDF 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_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 18072 bytes
SHA-256: d981f799a22b8074f3872dd06f390ce33704a65fe8340dbb5b87c96feea40156
font_02_sfnt_off0001256c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256C 10488 bytes
SHA-256: ed33ba7ca9656a4764a7c1cb7d6fbb9c0fd1e1a5e44ac87af929dff019e10f08