Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95cb67dda3a8dd5…

MALICIOUS

PDF

76.6 KB Created: 2021-02-07 08:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cb1c57e475fc6ae94528978f79154caf SHA-1: 38d7a7008cf8109b893e1b72848919c1aba26048 SHA-256: b95cb67dda3a8dd5471b1964a5459eec4515cfa6af026c521cfa7235f659d377
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://yafferge.ru/aws?utm_term=o+liberalismo+contempor%25C3%25A2neo+antonio+paim+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_5fcc42d11e229.pdfIn PDF document text
    • http://sandiego-podcasts.com/reticular_formation_function_examplecp1hs.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/0d8cebbfc.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/a7ef705aa7.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/povarijoj.pdfIn PDF document text
    • http://alexandreablog.com/85280595715v2n1m.pdfIn PDF document text
    • http://just-gopro.com/stock_car_racing_experiencexjb7k.pdfIn PDF document text
    • http://ujjjrrrrr.space/89822782185ongki.pdfIn PDF document text
    • http://yazansoft.com/adobe_captivate_book20wtw.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/xidabife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384484/normal_6006309d271a7.pdfIn PDF document text
    • http://shopeuro.pro/guitar_chord_cheat_sheetb6t84.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/5931891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_5fd7f902ae3ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivobojunoloma.epizy.com/lolukigepuwosun.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/japajupo.pdfIn PDF document text
    • http://xusoloturokuk.epizy.com/15244458597.pdfIn PDF document text
    • http://tabojiterakan.rf.gd/zemonotizufugez.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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 5708 bytes
SHA-256: ed70475ed07c142c1e0d760c1df98e390d1fccfd564e73dfa154374192601788
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 13024 bytes
SHA-256: e7d98608784e611e46480081b0462695b8df9382c2c2998cf53b24d9f7ce4ad7