Malicious PDF — malware analysis report

Static analysis result for SHA-256 31321ce076bd6559…

MALICIOUS

PDF

88.5 KB Created: 2021-02-13 15:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6edcb501da8bf058b5f38994486cafaf SHA-1: 930c2735ba1ee35af2948cdb1894eebb52ed8cf6 SHA-256: 31321ce076bd6559f41705da01ee7d87485e24656ed84192bf8c7647c545e68d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jottigo.ru/wix?keyword=my+feudal+lord+analysis+pdf PDF link annotation
    • http://noxodexuvalolum.iblogger.org/11312089277.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/51233043337.pdfIn PDF document text
    • http://antinomi.design/webtoon_unordinary_episode_174ju608.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/uigjdhb/46094655271.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/jiXhgjj/abbreviated_electron_configuration_sodium_ion.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/ysKieie/jobetajipawujifivav.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/dbgihbF/battle_bay_game_code.pdfIn PDF document text
    • http://boxoxele.22web.org/beutler_honeywell_thermostat_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471081/normal_5ffba69f52081.pdfIn PDF document text
    • http://natnat.fun/mexidexariwuzuroramodezuv4bk9y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498404/normal_5fc9d9efa7a74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pewulalabes.epizy.com/vizio_watch_free_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/clicker_heroes_transcendence_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/wemujupun.pdfIn PDF document text
    • http://xenemusexo.epizy.com/chevrolet_malibu_2013_review_consumer_reports.pdfIn PDF document text
    • http://vakisetituli.rf.gd/degatolofobum.pdfIn PDF document text
    • http://kuwopugivowivo.rf.gd/95797996204.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/dinoxefijuvukem.pdfIn PDF document text
    • http://lobakixadob.epizy.com/minecraft_1._14._4_pc_cracked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001126b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126B 4944 bytes
SHA-256: 4430cd98fb1a28eb8031b3b6a023ea7b7f3d57b1fd9f73456017540f248707e6
font_01_sfnt_off0001234d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 10160 bytes
SHA-256: e549b6eaa8b1cb69bc8c7c8f152e28132acca5e6b4ee54aeba63391c3609b6ca
font_02_sfnt_off00014609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14609 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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