Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef9c952a35b0438…

MALICIOUS

PDF

71.6 KB Created: 2021-02-27 09:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fb3f368a790341f526b1c14935533ede SHA-1: 3a1563b3023f6219f34e074357da0ecd2567fb6e SHA-256: 5ef9c952a35b0438fe9a429b8b438f26e4fe257067777d452039416c88be0897
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/award?keyword=baby+girl+names+that+start+with+k+in+spanish PDF link annotation
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/datojirubu.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jesl4ii/shark_life_animal_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_6029d6d438476.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/ihgegfq/blaq_tee_freenet_apk_download.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/xuzenipodufafebop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446496/normal_5fffc4b560635.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/peladukanetu.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/bokepavarej_gelelej_fasivujim_radedalutamaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_60358559739a5.pdfIn PDF document text
    • http://arfesopt.com/buleja37ob4.pdfIn PDF document text
    • https://zofekumu.weebly.com/uploads/1/3/4/7/134741387/95438f8faa6af2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481067/normal_5ff8973789db1.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/fmehaj8/hello_dolly_songs_in_wall-_e.pdfIn PDF document text
    • http://detonic-romania.website/manualidades_navideas_2018_para_nios8rkmq.pdfIn PDF document text
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/xexilumafe-moberiwu-rikur.pdfIn PDF document text
    • http://chategratis.online/95215420042hd7hw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5fdb09df6890c.pdfIn PDF document text
    • http://whysmall.space/82642750744phgva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB27 5680 bytes
SHA-256: 23880a7b9642197ee9ef9fb2af60e1cf2e1249547c8f8e895ab5a8703a965c06
font_01_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 10184 bytes
SHA-256: 0fb9520b2dd2e2af83a451c68a75b64c40b6e61de2ad232d898f7bf9d3111492