Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e86e9ecbef2939…

MALICIOUS

PDF

63.9 KB Created: 2020-12-01 07:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a8847b8921d8936d5fd646f0c0bdc3a SHA-1: 570b8b85e3d6a587561f533e438038a8f2be5ab8 SHA-256: 25e86e9ecbef2939b858b5d354cad15199a45397ddb7fdce66391a6ea6d7ef7b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, indicating a phishing or malware distribution attempt. The heuristic firings for 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/123?utm_term=battle+of+lexington+and+concord+interactive+map
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/siwatuvoxuzije_dibilit_zobupa.pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f98167b48620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50fde18c5c478ef27951/1606373629555/kijozuruku.pdf
    • https://s3.amazonaws.com/somisilegex/excel_vba_find_last_column_in_worksheet.pdf
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc0e9a4fa04221c7140ec46/1606478244277/ronisiruwunewovagupewutev.pdf
    • https://s3.amazonaws.com/jedobufudajewu/possessive_nouns_activities.pdf
    • https://s3.amazonaws.com/jexijer/infrared_thermography_seminar_report.pdf
    • https://s3.amazonaws.com/xazarujokemus/multiplying_and_dividing_decimals_worksheets_5th_grade.pdf
    • https://s3.amazonaws.com/dorobukasawituw/best_order_mega_man_x3.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04f6173fb5383b68bceb/1606288630827/16455887104.pdf
    • https://s3.amazonaws.com/kovilowab/netflix_android_tv_4._4.pdf
    • https://s3.amazonaws.com/paxivogedewilu/cooper_burbank_recruiting.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb3f.bin
6bf9cae666ecc51f6e1fcf289101e59d6edbceb333302482e3855cba3c7789a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3F 5472 bytes
font_01_sfnt_off0000cddc.bin
66ad4cc3b6ae8abbf4d30cd8db54ba89354bfbf52c48a84ebe122b7ce5e3ef86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDC 10744 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.