Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d1aadf000c4f0e…

MALICIOUS

PDF

70.1 KB Created: 2021-03-02 20:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 11a8830177b8bb9014c0e7ace19b62d9 SHA-1: 16718a7fa093d255db4af2a108b2cbee4d56526d SHA-256: b8d1aadf000c4f0ec0fa569fd75dfc00df38b7accdda2beaecbc239e3dd2e51e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=motorola+whisper+hz850+manual PDF link annotation
    • http://goodnaturak.space/naruto_online_game_for_androidjrnem.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/eYBcp2A/13578241568.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/3FrhifD/58337223560.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/aFhjDrp/38438633287.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/jggIqie/real_life_simulation_games_unblocked.pdfIn PDF document text
    • http://idealica-official-it.website/esma_remuneration_guidelines_aifmday98m.pdfIn PDF document text
    • http://macsk.space/columbian_exchange_worksheet_middle_schooldjf2b.pdfIn PDF document text
    • https://lovokavupas.weebly.com/uploads/1/3/0/7/130776776/5643997.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/igujaih/92837102854.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/pawakisimarojamatuwaxorvg721.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/pvha2hi/kegupadiliruludijeduzojur.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/ia3oiZD/mulololu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403674/normal_5fef4475b813d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_6033406346bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fd11b80347de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463791/normal_5fefdb20b9dbd.pdfIn PDF document text
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/fazomabupe.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/HhLSuih/kipugerefele.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/fbpghif/soduvodovot.pdfIn PDF document text
    • http://sodalabs.club/maxowedakavifovasopouqm13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/genki_second_edition_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/19224167603.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_off0000d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C5 5668 bytes
SHA-256: cab82c007495121415474b65c7a506eda931f52b9274585597ee17053f6ca06d
font_01_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 9892 bytes
SHA-256: 9a634001fcd4bb167071b702af5a0e5d66378afea91f41ca1beaebc7220da280

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