Malicious PDF — malware analysis report

Static analysis result for SHA-256 f829c81bcd8e2fc6…

MALICIOUS

PDF

68.2 KB Created: 2021-02-25 21:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: bcda0dd95bd95ff20bc322f1e0f5e0e7 SHA-1: 86f56d8e92b3c5cbfbbb28f34bd2f743bea3f09c SHA-256: f829c81bcd8e2fc6718a1bf2cced81be3aba160eea3ef8a4ab06c65c3235a831
146 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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/award?keyword=eton+frx3+instructions PDF link annotation
    • https://cdn.sqhk.co/malofavu/hg5hebE/icy_veins_wow_classic_warlock.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_6023768226ae5.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/chcijh1/bubble_witch_saga_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/5Mjabb9/32760474629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5ffd6a4b42c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5fd70c3839a25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378167/normal_5fdf9932804ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_5feaed7a6f0d8.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/hihjZy8/good_webcomics_to_read.pdfIn PDF document text
    • http://wopudidadufi.22web.org/tojifepazodubil.pdfIn PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/wejokuv_xujuzasip_gowewufu.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/nitawinudaliki.pdfIn PDF document text
    • https://tuganokume.weebly.com/uploads/1/3/1/4/131452880/0861e3a60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalotidel.epizy.com/the_halflings_gem.pdfIn PDF document text
    • http://zukivit.epizy.com/7419048287.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/41213842695.pdfIn PDF document text
    • http://tokofelutuj.epizy.com/letter_y_worksheet_for_kindergarten.pdfIn PDF document text
    • http://gawexerexi.rf.gd/majodivan.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/bijli_mitra_app_for_pc.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_off0000c905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC905 4824 bytes
SHA-256: af36d673534853a38566d0ac1ca7bba6e6915a042991e2de1b1063ea4af3c888
font_01_sfnt_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 13392 bytes
SHA-256: 8949986ea9503549f6bb1d9ed00903a6899cbf58670de2df826e83d76f7a16f1

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