Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a72c7e5cc75f83…

MALICIOUS

PDF

65.1 KB Created: 2021-02-15 18:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 13d0ab1dd236ea7bbec080dd2cbb9579 SHA-1: 5f78105844fea095ee0fa6f59a8b72ace6cb817f SHA-256: 09a72c7e5cc75f8350eb250a56c357b87c7fd105ba6b4ff06b836b029b722885
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://baarspo.ru/wix?keyword=dalton%2527s+law+of+partial+pressure+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378831/normal_601467938a7ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_6012ae0c89413.pdfIn PDF document text
    • http://mexicotop3.xyz/kibekowody1j1.pdfIn PDF document text
    • http://natlab.ru/vevupu6htn5.pdfIn PDF document text
    • http://shothard.site/accrued_expenses_balance_sheet_deutsch1zeei.pdfIn PDF document text
    • http://premial.su/penodurl1z7.pdfIn PDF document text
    • http://trydouche.xyz/apsacs_date_sheet_2019_class_5cnzr2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490123/normal_5fc7ac2dd77fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_5ff825e1643b2.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/loranoduzuja/cell_differentiation_in_plants_and_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/free_live_tv_app_for_android_box.pdfIn PDF document text
    • http://vibixozelewiv.epizy.com/jurutabovibufiwonisu.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/2197657883.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/s_corp_income_tax_return_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/infective_endocarditis_prophylaxis_recent_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/34737045687.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/55363228039.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/guidelines_for_unruptured_intracranial_aneurysms.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_off0000c25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25A 5180 bytes
SHA-256: 7f41f8f8b817b3ec62c673f4ec990fefd507c9844356f3d31703796e033eff52
font_01_sfnt_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 10184 bytes
SHA-256: 2a9590b553ab8cd0b56bdc9b2f6208f376af0d55ff39fcc5af924df800b72fa2