Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f898f539a365c9…

MALICIOUS

PDF

72.0 KB Created: 2021-02-15 16:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 98e708471192c3ddb7ba6a8231519959 SHA-1: 00bcb608b4005e734ea59852803b1d849698fbf9 SHA-256: a5f898f539a365c985e8c94472c543d453f0fe8bb270daf053f0293f17c05d68
156 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wix?keyword=windsor+design+workbench+assembly PDF link annotation
    • https://cdn.sqhk.co/vixawutozama/ao0vijc/the_inner_world_review_ps4.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/91524186961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376849/normal_5fe0437b52f9a.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/fUIQxJi/loud_music_ringtones_mp3_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409621/normal_6005450b30530.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5ff678542b0af.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/YCije2H/download_game_the_sims_freeplay_for_laptop.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/9573908.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/3109852.pdfIn PDF document text
    • http://sarhello.online/90984153247yypxm.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/93330ddee8bbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5fdd395f4f6ca.pdfIn PDF document text
    • http://justamorem.com/zombie_original_recipe46ebn.pdfIn PDF document text
    • https://suterigegopos.weebly.com/uploads/1/3/2/6/132695321/9146202.pdfIn PDF document text
    • http://rilizikurejoru.22web.org/chalice_of_opulence_upgrade_guide.pdfIn PDF document text
    • http://wonder-ita.space/green_party_candidate_platformpga9i.pdfIn PDF document text
    • http://noxokolozoj.iblogger.org/cursive_writing_worksheets_for_2nd_grade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowadowir.epizy.com/waco_texas_crime_report.pdfIn PDF document text
    • http://wedejilifolani.rf.gd/whatsapp_wedding_invitation_card_template_free.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_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 5764 bytes
SHA-256: 73f4f430027707d753df201a56a422208d6cf521c5375ec155de6906d929e81b
font_01_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 11060 bytes
SHA-256: 14aa14c2a5d63c9bea361a5116400c10ba1c736b112380dc2d61b87ed504f100

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