Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9ae3b948f82518…

MALICIOUS

PDF

69.6 KB Created: 2020-12-24 15:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2deb6da2c8935cd23276ecd9862519f6 SHA-1: d17969f72560255e4ed9c8feb1bae4c67a77e12a SHA-256: bb9ae3b948f82518d33201ab74303c7ce37972bda2e6c8abcb0c84350530fe91
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL is part of the lure, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=last+minute+midweek+hotel+deals+ireland
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f8e1f3c7d0bd.pdf
    • https://cdn.sqhk.co/bakavaxa/RVq30IV/programa_vida_saludable_sep_2020.pdf
    • https://cdn.sqhk.co/xisiwuba/eMgeRie/word_craze_level_682.pdf
    • https://cdn.sqhk.co/sofaxuleruri/63t1Jgi/lekajejubexokakavitul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0d166d3c-30c5-4194-be2b-7962143272cb/11430239170.pdf
    • https://uploads.strikinglycdn.com/files/33fda682-4530-4ff4-9e7b-b08c489412a6/zikigup.pdf
    • https://s3.amazonaws.com/sugowubuf/vurofodipuforidufupagik.pdf
    • https://uploads.strikinglycdn.com/files/6ed53408-7bf2-4cd9-a4ae-3b8329f3354e/5348499431.pdf
    • https://uploads.strikinglycdn.com/files/7755e63b-8828-4451-8319-e6438c3f5d61/blackweb_power_bank_10000mah.pdf
    • https://uploads.strikinglycdn.com/files/54fa5cd5-bce1-40c6-9137-d32bc9005bc7/fujafepob.pdf
    • https://uploads.strikinglycdn.com/files/9d3ee5c3-e8d9-4132-93e9-ae876b3056e8/data_analysis_and_decision_making_with_microsoft_excel_4th_edition_free_download.pdf
    • https://s3.amazonaws.com/xonobijikivo/border_officer_igg_games.pdf
    • https://uploads.strikinglycdn.com/files/3faaf90f-a7a8-4d67-809d-801aa46e9b85/62592557974.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_off0000d27c.bin
7f1763d06204d4d96aa5328304b1e587bf3c85441f22931a839a2a4424c11824
pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 5160 bytes
font_01_sfnt_off0000e3f4.bin
60d819e509fdc5b2ab0de1a51108d475a2406c079ea3150bc48689f0e5bdf58e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 11132 bytes