Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb37d7f650c52c9…

MALICIOUS

PDF

72.6 KB Created: 2021-03-05 06:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9c6dad187f0b9be1bcae3c10bdc5bce8 SHA-1: e88d2a99d00d1890f7cd63c2f7edaa5a12209194 SHA-256: ffb37d7f650c52c92db04c50f35795526edd84125461e3860c256c251ac2e808
144 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/award?keyword=descargar+biblia+reina+valera+online+gratis PDF link annotation
    • http://bawimip.sportsontheweb.net/fotunokez.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/how_do_i_replace_my_hawaii_state_id.pdfIn PDF document text
    • http://mareson.getenjoyment.net/xemufib.pdfIn PDF document text
    • http://gisisavodure.22web.org/bejiliwepujazogonudi.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/kujeso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367277/normal_60070087d844f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5ffa18fa2553e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5fdf217f9e1ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fe8a5e865191.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/94584255453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452217/normal_60072f6ee22f3.pdfIn PDF document text
    • http://vumavotanumibuv.iblogger.org/33748252915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_58d55ecfff09498181020b0738b4c81d.pdf?index=trueIn PDF document text
    • http://rovarede.rf.gd/33779399985.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_8c683e2c76d249218099b6973207d4e0.pdf?index=trueIn PDF document text
    • http://fezabum.rf.gd/sotapugutovubijuzewa.pdfIn PDF document text
    • http://timefata.epizy.com/kasisoxozed.pdfIn PDF document text
    • http://piwosilavor.epizy.com/soxugebumatirowade.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_off0000dc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC12 5168 bytes
SHA-256: eb88c1a5d730c5e5e234f770199e99e6765ff6b651385040a15404d4944be0e6
font_01_sfnt_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 12184 bytes
SHA-256: 2800fde595942699a50ba48607325e69a57a711dd588c46e3be0809dfd9cf94e

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