Malicious PDF — malware analysis report

Static analysis result for SHA-256 e319a7f004761a31…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 11:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: eb0383713d83c6b0a2e2f24985d46588 SHA-1: cf86e0aaf5f8fed92949b59712ca12ad8fb311b7 SHA-256: e319a7f004761a31e10bebea20b70ca976f204c5b824ecf6e4240d24d267f1e5
184 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
  • 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://crophysi.ru/123?utm_term=jbl+lsr305+dimensions In PDF document text
    • https://cdn.sqhk.co/zidulibu/gcHjche/bkash_app_old_version_2019.pdfIn PDF document text
    • http://mafonofolifeda.22web.org/kuralupub.pdfIn PDF document text
    • http://m-ryanaf.site/apc_smart_ups_2200_battery_replacement_part_numberk2zgw.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/gqhdzjb/anime_face_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/aczifij/clone_space_32bit_support_ios.pdfIn PDF document text
    • http://cosmicgig.com/67050374572z9dut.pdfIn PDF document text
    • http://art-practice.org/2009477795320wyc.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/g4YAzhe/sozaxexoge.pdfIn PDF document text
    • http://boomua.site/clash_of_clans_hack_app_iosa68ku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://loletusu.rf.gd/bhatti_vikramarka_free_naa_songs.pdfIn PDF document text
    • http://zivusiden.rf.gd/10225297667.pdfIn PDF document text
    • http://jegovogetaferop.epizy.com/41423805647.pdfIn PDF document text
    • http://rubaporejolo.rf.gd/resonance_caution_money_online_form.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_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 5320 bytes
SHA-256: 67447c81a8562b45d8f23554f653a463b9ee4d8002af52c039489fd950325afe
font_01_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 10420 bytes
SHA-256: cdd948696533812dcfb6f0241596036d4d2cd655c41a52b8bfffcb149b2ecd75