Malicious PDF — malware analysis report

Static analysis result for SHA-256 956654dd5ac89bdd…

MALICIOUS

PDF

75.5 KB Created: 2021-09-18 18:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f301fe8757b91dd4c9f8df5c726e019f SHA-1: 3f23892fe3f5916b425c2c45f78ca0ed230e4bb1 SHA-256: 956654dd5ac89bdd3dbea7a3dbad41fe8f86bdd11761cee5916a8e254ca58f01
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to T1059.007, and the overall nature of the PDF as a lure suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://www.boldino-hotel.com/ckfinder/userfiles/files/38577007245.pdf In PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/941c6fce576e75b54c9a0a138d2e7fa9/78887257444.pdfIn PDF document text
    • https://pecintajp.com/contents/files/dedidavafukom.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/61036130022.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/danutusowumebimo.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/movelenadobagejozodidogov.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/10605875909.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/kazefabe.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/98083702294.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/35552978223.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/bofuvegesafuk.pdfIn PDF document text
    • http://rld-carbon.com/file/11956082288.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/luvigitekakajofodutet.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/zeriwagaxaveju.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/61928212153.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/nodamareduj.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jegozuxudalusominazokap.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/9253245913.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/xixadekixexikegibufekat.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109171014406274.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/8041761675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=autotune+android+app+downloadPDF 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_off0000c326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC326 10384 bytes
SHA-256: cb9f8c4d6ca0c0e341fca7a1b6bdd3cd21f4ddf90d799c11954f0c1adb6521b7
font_01_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 17532 bytes
SHA-256: 066c541e63763a7e55aa26eaa6cd7253c22573b09f23ee7f5ae8ab1903bc7f3f
font_02_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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