Malicious PDF — malware analysis report

Static analysis result for SHA-256 decd6c8c072cd904…

MALICIOUS

PDF

77.2 KB Created: 2021-06-08 03:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 744ff107b2f3879dc6fc312776314e6c SHA-1: 48076f129ff63c5c27ab8935c88740b6058a753c SHA-256: decd6c8c072cd9048aad24531adc18ca38dad0bb80598023ac64656d4257dc1b
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'space mining simulator codes 2020' and the wkhtmltopdf tool, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/pbw?utm_term=space+mining+simulator+codes+2020 PDF link annotation
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/5607688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5ffd7a6aec44f.pdfIn PDF document text
    • https://karopudalel.weebly.com/uploads/1/3/4/8/134881347/9518906.pdfIn PDF document text
    • https://lunokebu.weebly.com/uploads/1/3/4/6/134648327/bijora.pdfIn PDF document text
    • https://ruwezowoja.weebly.com/uploads/1/3/0/7/130776808/9944730.pdfIn PDF document text
    • https://fuwidomanajano.weebly.com/uploads/1/3/0/8/130874101/3456a5.pdfIn PDF document text
    • https://fesakakosirin.weebly.com/uploads/1/3/6/0/136015409/4289340.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379220/normal_5ffd2a89472f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fda3a5a0460e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fcf6447dadb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5fdd6f53b4e56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98213586-ec5e-414c-9611-fdd68abae8bf/vupeniduzuzos.pdfIn PDF document text
    • http://daxulesep.pbworks.com/f/waxodipopov.pdfIn PDF document text
    • http://patuwit.pbworks.com/f/seville_classics_fan_costco_manual.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144519543/formato_de_carta_de_buena_conducta_primaria_editable.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/danny_phantom_1_episode_7_dailymotion.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/144562860/27090366396.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144498192/24638775004.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144468216/how_many_steps_to_do_each_day_to_lose_weight.pdfIn PDF document text
    • http://kigijujozi.pbworks.com/f/bodorukadajatabukoluli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6254551b-e99a-4c16-b5b7-5f856993aed3/disgraced_play_ayad_akhtar_characters.pdfIn PDF document text
    • http://morabef.pbworks.com/w/file/fetch/144728586/rekoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a731343-ca95-4248-9e7d-052f518076ab/who_writes_presentence_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/441c9831-353c-453a-82ec-bfd81f79a9fa/the_book_of_dragons_nesbit.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144760038/science_worksheets_dont_grow_dendrites.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_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 5768 bytes
SHA-256: ca8134570baae480eb5103cccd5dfbbc30f826c5ab1c1b118529763d86502e7d
font_01_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 14156 bytes
SHA-256: f0233c2f0c3d0294ef9b4436395a27b759b3336bc01d716b944795bfd2c4ff0c