Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fe21128aceef01…

MALICIOUS

PDF

73.8 KB Created: 2021-02-25 01:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 56dac2c31388c58fe5503182fb353c5b SHA-1: f9c4ba761dfb1e023cf7490db879ecfc7d81dc3f SHA-256: 74fe21128aceef01ed701499cac9616a57ce3a5258b802e53d8366cce18e2e95
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/award?keyword=online+spoken+english+courses+in+hyderabad In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470209/normal_603012a306fa5.pdfIn PDF document text
    • http://gokutep.22web.org/articles_exercises_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_602ae4e9a9cc8.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_is_system_engineering_process.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/1748991157.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/eZpEGgd/24852025633.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/gcMl7jd/gepirewijobizuluwosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5fff62ab9c919.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/igiCqjb/scary_ghost_sound_effects_free_download.pdfIn PDF document text
    • http://lisifakus.66ghz.com/65010835187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_60172c2585a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_6014e57e93abb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://norilonabu.epizy.com/streamline_english_destinations_teacher_s_book.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/39966259723.pdfIn PDF document text
    • http://gaditerigasut.rf.gd/essence_magazine_submission_guidelines.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_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 5668 bytes
SHA-256: a2502c4ce810d3c1313d80a97435ff6eb36a1d74ca14a2723a08148259eb35ea
font_01_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 10424 bytes
SHA-256: 7cb20a2cdc16950e92a4dc4c2d23c19761d94873d12e4e3e32540c9b2eb53a6d