Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89d5c45c4e890fd…

MALICIOUS

PDF

74.9 KB Created: 2021-01-28 16:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f91d5809647d922375d21523176e7f8f SHA-1: d7b2898912bdb823f7d1a9ca7a71c6356fd3612a SHA-256: c89d5c45c4e890fde5b6483f9c2cfe605599b9408f6c8e89952fda28f203fed8
192 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=candy%20crush%20saga%20online%20hack%20without%20verification In PDF document text
    • http://djami.ru/the_village_barbershop_movie_reviewchi5s.pdfIn PDF document text
    • http://neojust.ru/rci_2990_manual5sd7n.pdfIn PDF document text
    • http://afracheat7.xyz/words_with_s_h_o_o_t_eieod7.pdfIn PDF document text
    • http://verification-help.com/asteroid_impact_earth_2036n239k.pdfIn PDF document text
    • http://instapriz24.site/jijixodl5f5s.pdfIn PDF document text
    • https://cdn.sqhk.co/zujarepifej/ichdjTx/naval_warship_pacific_fleet_mod_apk.pdfIn PDF document text
    • http://dfwshootersupply.com/monkey_meme_covering_eyesg286t.pdfIn PDF document text
    • http://vovality.club/siren_head_sound_of_despair_download5tl3z.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/ehdhahh/95123438492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejazimuperolik.rf.gd/android_developer_pay_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/rigepixaxazupediride.pdfIn PDF document text
    • http://xabofaveretezu.rf.gd/dallas_cowboys_cheerleaders_uniform_for_sale.pdfIn PDF document text
    • http://godemesefiw.epizy.com/past_tenses_advanced_exercises.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/turiguzeteji.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/invitation_to_professional_event_template.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_off0000e7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AA 5508 bytes
SHA-256: bb6e577b3da23632833044d15c14caeb098d4d15ab5b6868f502dbc0ec819902
font_01_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 10500 bytes
SHA-256: 6e0980fd6070d77ae1debaaeec0c33467d25c7512e0a226ad626af90c829a5b3