Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc15b74498d9cb18…

MALICIOUS

PDF

73.2 KB Created: 2021-02-25 06:14:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 75b44e1242a1ccfdfa44e482c66e14e9 SHA-1: 572c36a338bbfe3ef17ca22608d3d127fb6ae2e7 SHA-256: dc15b74498d9cb18194773536615fbd3fdacfcc59a9b146a7ea037a8de20d022
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/award?keyword=what+is+computer+virus+in+detail PDF link annotation
    • http://bivozebavi.iblogger.org/chicken_run_ps1_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503033/normal_603428f59ebbc.pdfIn PDF document text
    • http://votofeveta.iblogger.org/subefefediwufudefix.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/jejFhjh/razadyne_er_dose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_602ec35c13303.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/divelikubapiwaj/afterglow_app_pc.pdfIn PDF document text
    • http://zotubune.myartsonline.com/15_hp_gamefisher_outboard_weight.pdfIn PDF document text
    • http://sawexelisam.epizy.com/balance_sheet_sample_excel.pdfIn PDF document text
    • http://watuvul.epizy.com/scag_freedom_z_36_for_sale.pdfIn PDF document text
    • http://pibumox.rf.gd/ias_puzzle_questions_with_answers.pdfIn PDF document text
    • http://sarigeselos.epizy.com/why_is_my_fridge_not_working_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/palukizero.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/zunanu.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/coliform_bacteria_ez_test.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/dekes.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_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 5388 bytes
SHA-256: b7fba2807d8c00caf4ec948f64d0eb272a086ec0d7f7fbd37ed2db7bb852a870
font_01_sfnt_off0000f57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 9936 bytes
SHA-256: fae5d878b402f8d08825ae7f19b828f9838b0be22449c012c3e5d50afe7dec50