Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad957968a7efb1b…

MALICIOUS

PDF

72.6 KB Created: 2021-02-10 14:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 088225a3bf1bdec6d8fe73ccc28e17ff SHA-1: 5ce285e42ff158a9a5e9b4a7cd26b4d4603afbef SHA-256: 4ad957968a7efb1bdde449a032c4ccc8ff4d62fbfa8bb000b82eade3b4cfe78f
126 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
  • 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://maypoin.ru/123?utm_term=how+to+find+absolute+extrema PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5ff6994dc8e14.pdfIn PDF document text
    • http://vusejulene.iblogger.org/free_wifi_calling_app_for_android_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/Wjfhiih/70147582659.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/kixot.pdfIn PDF document text
    • https://gudetopop.weebly.com/uploads/1/3/0/9/130969639/narapuzas.pdfIn PDF document text
    • http://sawawobutexukut.iblogger.org/13423895586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_602335af80c4d.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/5Hj0icl/74103947088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380392/normal_5fe9e23e87661.pdfIn PDF document text
    • http://fegebekuxew.22web.org/britannic_movie_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_5fff0f42603d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kumasala/amar_singh_pawan_ke_gane.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/free_nctb_books_2019.pdfIn PDF document text
    • http://businewon.rf.gd/carrier_30gx_chiller_troubleshooting_manual.pdfIn PDF document text
    • http://tumofif.rf.gd/29222999401.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_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 5316 bytes
SHA-256: 22d00770fa9a15a76d7f9b31fa982fb36ece403a3541c5928352beee8de1056c
font_01_sfnt_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 11244 bytes
SHA-256: 97d7971442d2c58794ba55cb82d390510b18712c5124d39e9463b311763e9ee0