Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54a0d22bbfd87bd…

MALICIOUS

PDF

70.7 KB Created: 2021-02-15 14:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8d2885638de805689aac7940e16f95a4 SHA-1: c6ad1dd11837b5b43439681cb9d9ee7cbb2e036f SHA-256: b54a0d22bbfd87bd72bb82457ff2341e7daefe6b96ce0999c850db3c1823a660
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://yafferge.ru/wix?keyword=safe+answers+surgery In PDF document text
    • http://idealica-co.site/zedozepuiv7tk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_60092e78061d0.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/jibUbih/toca_pet_doctor_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469101/normal_6028bd9538f78.pdfIn PDF document text
    • http://differencecheats.net/batokevarulilekagy9rex.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/cjihehf/sculpture_garden_mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd5faf5444ae.pdfIn PDF document text
    • http://bavavemerit.22web.org/aprilaire_700_manual_vs_automatic.pdfIn PDF document text
    • http://gotuxeloso.22web.org/67644948934.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/fiac7CC/ps_remote_play.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/wovitiku/takederobafeba.pdfIn PDF document text
    • http://dunupilopun.epizy.com/harvard_referencing_example_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/insight_timer_premium_apk.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_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 5200 bytes
SHA-256: 312b3e87ee3d8651f391641c0192c09a978bf0b57992232788279c8f006bc06e
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 10104 bytes
SHA-256: bc842873f41bbe53e70358a7825ffe5958399df5f06478b517bea3c57ee81f4a