Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d2230bb79ae955…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 19:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ecf2dbf126a37348058aeb532814dc29 SHA-1: c33e40445632c84e5c9fe3380a3bee033a1c0350 SHA-256: 76d2230bb79ae955920687e73038954c1c81c2bf2cd5c1f6fa4dfaed04225c6c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The document body, though heavily obfuscated, contains keywords related to game cheats and application versions, possibly as a lure.

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
  • 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://bologen.ru/wb?keyword=sims%203%20pets%20cheats%20xbox%20360 PDF link annotation
    • http://soinjaga.ru/taco_bell_al_fresco_nutritionotqh8.pdfIn PDF document text
    • http://ejinaya.com/how_to_start_a_ms_project_plan21dkv.pdfIn PDF document text
    • https://gubaxuxozixiviw.weebly.com/uploads/1/3/1/3/131383744/vokaguxoz-bepevosifomitaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426945/normal_5ff29cb18059f.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/pikipigesadaw.pdfIn PDF document text
    • http://katermore.ru/avast_antivirus_free_for_pc_offlineb9hpf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_602f5b79b48df.pdfIn PDF document text
    • https://zelekunidos.weebly.com/uploads/1/3/2/6/132682808/moribomubajemono.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/how_much_sodium_is_in_a_taco_bell_power_bowlsysgs.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/gitezogerevifivemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5fccab0cd6d77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5ff91cac51c6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_603210dac6f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_6039eec12e5ed.pdfIn PDF document text
    • http://istlan.space/411211320864q30d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497075/normal_6006e10b95832.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/fujitsu_halcyon_mini_split_dry_mode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitavaxizajemo.epizy.com/resumen_luces_de_bohemia_ramon_del_valle_inclan.pdfIn PDF document text
    • http://bilumolekotejoj.rf.gd/11585385592.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/how_do_you_reset_the_liftgate_on_a_toyota_highlander.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_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 5816 bytes
SHA-256: 7400fa5c8e2e48135b1566d33790f591da97c6abef756d05f09640ec69309e9e
font_01_sfnt_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 13588 bytes
SHA-256: 270d6127fa733374ac1089dd7af2a9b423d71167b0f462a25bed847dd10fb6b8

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