Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0e96f3d448a340…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 06:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1106ec7c24d8660950f0f02b8ca72907 SHA-1: 0fd1f5e8cfc32ee232553492e8417bb32809d262 SHA-256: dc0e96f3d448a3405a0a06df17bb241e5b6e678c971c788bc4ca978fd3b1ebb8
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=excel+macros+online+tutorial In PDF document text
    • http://kemytbok.xyz/7233853218827jiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_601f0007b0eb3.pdfIn PDF document text
    • http://nextauto02.ru/31068093687ec2qg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456667/normal_5feb4b51e991f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fe33ce8d1c5c.pdfIn PDF document text
    • http://magefaro.22web.org/the_hound_of_the_baskervilles_movie_2017_cast.pdfIn PDF document text
    • http://keep-travel.com/54711208840309t3.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/HrJgchi/touch_math_skip_counting_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_60196cae0a8a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxogego.epizy.com/free_hd_movies_2019_app.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/bad_genius_vietsub.pdfIn PDF document text
    • http://suvumudupese.epizy.com/monthly_budget_spreadsheet_business.pdfIn PDF document text
    • http://dotimazuf.rf.gd/how_to_use_battery_tender_plus_on_a_car.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_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 4968 bytes
SHA-256: 8621578693b934ca22bbea69ba7f8d77a8a47139a007c7747cbd7dd926867970
font_01_sfnt_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 10136 bytes
SHA-256: 33eabdbc6e87921dabcef8243cf51243c001df2bf48c82873dd57367130260ee