Malicious PDF — malware analysis report

Static analysis result for SHA-256 3594c7665a40c055…

MALICIOUS

PDF

96.9 KB Created: 2021-04-01 21:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61040748ca5b6df19ae76968a346d942 SHA-1: 4425967fd0f5f0b6e3640f5de72e3beae56e5d85 SHA-256: 3594c7665a40c0556429b3d30020dea1e02cfead0284870e8978391b534dd02b
134 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a significant heuristic indicating it functions as a link farm on disposable hosting. One prominent URL, 'https://mezovuduw.ru/strik?utm_term=will+there+be+a+season+2+of+ancient+magus+bride', is flagged as unknown reputation, suggesting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/strik?utm_term=will+there+be+a+season+2+of+ancient+magus+bride
    • https://cdn.sqhk.co/xeduwukaxusa/w6Agihe/zombie_frontier_3_cheats_no_survey.pdf
    • http://suzamajotibe.mywebcommunity.org/les_miserables_musical_streaming_free.pdf
    • https://cdn.sqhk.co/boxokozofe/hagijd1/42842828505.pdf
    • https://cdn.sqhk.co/pojimisuso/jiiZCSx/spongebob_game_frenzy_free_play.pdf
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ff296d3a2fcf.pdf
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60111b5ac5fed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • http://todiwefexoneb.atwebpages.com/87317241804.pdf
    • https://s3.amazonaws.com/ritoma/suxuvi.pdf
    • http://telomilabevi.epizy.com/81149789862.pdf
    • http://pevuzimoba.rf.gd/kanevererosixezonefekuxeb.pdf
    • http://nununad.myartsonline.com/corazon_de_nio_tab.pdf
    • http://lusavudipanu.epizy.com/back_office_job_description.pdf
    • https://s3.amazonaws.com/wujixus/identifying_acute_obtuse_and_right_triangles_worksheet.pdf
    • http://zitadufafasid.onlinewebshop.net/hyatt_brand_standards.pdf
    • http://vajexakatozezal.epizy.com/98901456113.pdf
    • https://uploads.strikinglycdn.com/files/23392f76-8122-439b-b12f-1ae19886cef6/hampton_bay_ceiling_fan_light_kit_replacement_parts.pdf
    • https://s3.amazonaws.com/jixeremipet/46896394824.pdf
    • https://uploads.strikinglycdn.com/files/4bb20cae-a7e3-4b77-a4c7-23207172d357/zenusifibepesoforuporo.pdf
    • https://s3.amazonaws.com/wolawatin/allah_99_names_free.pdf
    • http://fapiruligifujo.epizy.com/kisah_ulama_menuntut_ilmu.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
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.htmlTibetan
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010036.bin
cde8daab5b9457e2278c3ff82d802f12eef3d76e2d4275b6d4bef88342748ee5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 5720 bytes
font_01_sfnt_off00011391.bin
17832d6071c171010d6636d3a56474f761f68f4aa2d699bfab992cc09385189a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 9872 bytes
font_02_sfnt_off00012692.bin
93386acdd05ce4e60a249146cfdf5c6ec6b43bfc775dd723a3ab296bb027c25d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 5640 bytes
font_03_sfnt_off000137cc.bin
44e374101c9570dd7f09ac0d45ddf64b88e5acbea6fe08be59ae5b76cd5f255e
pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 11644 bytes
font_04_sfnt_off00015ed2.bin
e53d3498417cdd86ae52010adab30d5c3fcf0cdcdaca5638d173600a8e7d004a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED2 16316 bytes