Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31ade956c0417ba…

MALICIOUS

PDF

69.5 KB Created: 2021-01-12 21:28:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6cfbbbbce1b15b4489d463b743600b07 SHA-1: ba89f1bd87b14b66519dce906983b5841f892868 SHA-256: b31ade956c0417bac46d0be7de41bedf39ca80512f384bf05d9f56cddf56f1c6
196 Risk Score

Malware Insights

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

The sample is a PDF that uses a social engineering lure, impersonating a Google Drive search result for a popular movie to trick the user into clicking a malicious link. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document encourages the user to install a browser extension or update, a common tactic for credential theft or malware installation. The presence of numerous external links, including one to 'traffnew.ru', further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffnew.ru/123?utm_term=google+drive+jurassic+world+2+fallen+kingdom PDF link annotation
    • https://cdn.sqhk.co/nebuneduzib/RM8o10f/space_movie_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/jifonakilux/Pjijhff/cbse_class_9_science_ncert_book_download.pdfIn PDF document text
    • https://site-1178634.mozfiles.com/files/1178634/template_login_page_bootstrap_4.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/xovekikipuxusi.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/1f082f11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/memexelu/activity_dalam_android_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/samsung_galaxy_s2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/dajozesozefamajigigutas.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/addition_and_subtraction_to_20_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/sage_50_accounts_v23_free.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/xejudepopevinogajunow.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/jejewuku.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD394 5796 bytes
SHA-256: 1cd37d005c23e30de833296115b949479fd836b11954f5ae1b1d10e18aede014
font_01_sfnt_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 9968 bytes
SHA-256: 73bb34e7e8168fd478eba13276caaa7bff3b57a081a89244fc3b1380d44b6019

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