Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da9599d643d360c…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 04:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 49cf8cec2d72c4acadb776519fbeaed5 SHA-1: 3e781298aba2e55697c54fd304d156745b868039 SHA-256: 5da9599d643d360c056e435d281d9edf52b5ec6b9de80e9d2d336097d07d0f42
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript and presents a visual download button with instructions for a password-protected archive, indicating a phishing or malware delivery attempt. The numerous unknown URLs suggest a link farm designed to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://tortugafilms.ca/adminfiles/file/varowaxine.pdf In PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/mapejilinab.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1630975888sumukapisutitupikuwo.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/92306819252.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/75324907705.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/benobazazigoxemulesofaw.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/67843530223.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/74209169842.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/53713464448.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/562a7332ae3b6237217629f573181368/vixezedodiximotuwixakuvo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c835e712e90b023231c74969f7baf4e5/dobenekazowoso.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/13601394660.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/13601346934.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/26567304619.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/29394142122.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/punovesujet.pdfIn PDF document text
    • http://it-hair.com/userfiles/goredarajinipu.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/26467014188.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/37343936202.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/xutixuze.pdfIn PDF document text
    • https://eguiders.com/uploads/mowifepes.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/pevodamifijebuvinafid.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/14266053326134d3e702cae.pdfIn PDF document text
    • http://erictex.com/ufiles/files/87341873289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=pubg+mobile+download+highly+compressedPDF 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_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 11304 bytes
SHA-256: d68758bd4f5d1a2ca61cdedd51c1cc5733edd2c1ccc1beae7e9346509487dc84
font_01_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 18168 bytes
SHA-256: 8061994fdbeb49c86756ff32a739d310c382e12fdf7e047c6051c3981b9eae9a