Malicious PDF — malware analysis report

Static analysis result for SHA-256 77b910e1cb23d4e0…

MALICIOUS

PDF

65.5 KB Created: 2021-02-22 11:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: feb35bdc2858dc0f99da6928ddb02e85 SHA-1: c99008a74d129912b48a3da60dd489859c9193f7 SHA-256: 77b910e1cb23d4e08fa78552fe6904f10088f67776488f942a7e6437a23e495d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://crophysi.ru/wix?keyword=watch+floyd+mayweather+vs+manny+pacquiao+online In PDF document text
    • https://cdn.sqhk.co/jowowibow/hhbhgif/ding_employee_appreciation.pdfIn PDF document text
    • http://itactical.xyz/yin_yoga_sequence_for_rainy_dayuhebv.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/iehcjgj/grow_kingdom_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/ehbkhek/business_dictionary_app.pdfIn PDF document text
    • https://cdn.sqhk.co/mitebosareki/bjcpjfu/alter_ego_names_male.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/JHhcpZF/17156639711.pdfIn PDF document text
    • http://shmelev.pro/27445502156304p1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rolozipufulelo.rf.gd/lepasefizira.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tujigotimopupapatobuk.pdfIn PDF document text
    • http://getorisatenazu.rf.gd/borghese_eye_sheet_mask.pdfIn PDF document text
    • http://zijaxana.rf.gd/tejefanizoraletis.pdfIn PDF document text
    • http://rebagada.rf.gd/examples_of_formative_assessments_in_physical_education.pdfIn PDF document text
    • http://mubizutoperix.rf.gd/fluke_microscanner2_pro.pdfIn PDF document text
    • http://basefub.epizy.com/kakowezipafineriwinewaweb.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/bahut_hard_bahut_hard_rap_ringtone.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_off0000c2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 5788 bytes
SHA-256: c4a5b34f09618ce904e335112f0f657d8fac9998a3185443da10c52ebca9ca70
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 10196 bytes
SHA-256: 5232b16fed51745f61fb7f49808ec26f783ed40ccbdc53f1ae2542a203ce1466