Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af4b4437a7bc7cd…

MALICIOUS

PDF

69.3 KB Created: 2021-02-19 08:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dcf8bec8612b183636a04d93ac0c517b SHA-1: bc741fac41111f5bac1daad09adfd95a5a6b3cd0 SHA-256: 3af4b4437a7bc7cdf0addc23de3087785efa682cec1b8022bf4dede33848193a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=sub+zero+532+refrigerator+specs PDF link annotation
    • https://davijune.weebly.com/uploads/1/3/5/3/135315517/risifadutewifofufudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_602957c4ab0a5.pdfIn PDF document text
    • http://supsun-aero.com/bsf_tradesman_answer_key_2019v0ap9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_600cf4761b82b.pdfIn PDF document text
    • http://uspeh.icu/mejaso8awzl.pdfIn PDF document text
    • http://copyrightreports.com/45154663964lzmtr.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/apii5Ls/audio_pro_addon_t5_bluetooth_wireless_speaker.pdfIn PDF document text
    • http://bazis-rostov.com/dazijemawebitaliboludotaagg0j.pdfIn PDF document text
    • https://nusevusigafub.weebly.com/uploads/1/3/1/3/131398220/fozux.pdfIn PDF document text
    • http://boomerangoo.site/hkmet_kadn_tek_para_hd_izlerihig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe07fef4e5a4.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/physical_science_textbook_in_bengali_downloadh7hb4.pdfIn PDF document text
    • http://cg-designer.xyz/wapepatekokr0yq.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/SBribJ0/playmobil_ghostbusters_firehouse_smyths.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/jizyU9v/wilixiluwojufezerexuniw.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_off0000d045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 5864 bytes
SHA-256: c4a11029c3f2388bb0cd9872f275d692330ce8db6e5da17f0bea28bf3ebfdf10
font_01_sfnt_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 10608 bytes
SHA-256: b6bbe888793a694d8c0909aacdec57488188225686e5db720aea14b6eb26c7b6