Malicious PDF — malware analysis report

Static analysis result for SHA-256 decaa47ba15e7405…

MALICIOUS

PDF

73.2 KB Created: 2021-03-09 08:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c394accf73612d776d7d193e160dad24 SHA-1: e6cfcf1ecde1eddd1e4bd3842fe9bd31315c28d1 SHA-256: decaa47ba15e7405c34186802c38b91adb9a47e03ce01d7d4b115d5d8ad370a8
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://vilenefex.ru/wix?keyword=celina+city+utilities PDF link annotation
    • https://cdn.sqhk.co/kojetozativ/iiibygc/super_cobra_mustang.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494673/normal_60012e2f63973.pdfIn PDF document text
    • http://guitar.su/damizumadtb43g.pdfIn PDF document text
    • https://jibigevemur.weebly.com/uploads/1/3/0/8/130873945/nazaxurorafa_pexidat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_60251ce13d0de.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/gGLgehf/blockstarplanet_free_vip_2020.pdfIn PDF document text
    • http://rijupoxog.22web.org/20246598641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5ff78d0799413.pdfIn PDF document text
    • http://nat-fru.space/28868435960rebnu.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/nikigiw_pajaripidi.pdfIn PDF document text
    • http://znalomstvavip.site/barojovofiba7ja.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/jhifCLv/brawlers_voice_for_brawl_stars_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/PgSwgjU/72741932379.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/UtAjchi/ninja_dash_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_603a5a46a671e.pdfIn PDF document text
    • http://bestcreditcheck.info/ninja_blender_user_manualno1do.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/yOL1qhh/cake_decorating_ideas_autumn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixodog.rf.gd/6887713930.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/paxurelez.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/relagifiborevuvido.pdfIn PDF document text
    • http://tuwesexo.epizy.com/hollywood_reporter_phoebe_waller_bridge.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_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 4704 bytes
SHA-256: 29274ada24b18d107f1bbe423b0990a1b0c9abb659a92254c324ec50260770c2
font_01_sfnt_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 11108 bytes
SHA-256: ffb57460183bf090280d7a7611c67aca527620ba0c89c15935751b60c618f2ba

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