Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c089905355646d…

MALICIOUS

PDF

70.2 KB Created: 2021-02-23 02:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c8e918f55909f43323438aacf6583830 SHA-1: 841713599591d0b2cc324dc3a931fe8e9a6f4cee SHA-256: c5c089905355646d276637b31e7bc301a180065e502cc1a311558ec16a77723b
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://maypoin.ru/wix?keyword=oddworld+new+%2527n%2527+tasty+apk+indir PDF link annotation
    • http://importants.space/78920305059fz6ew.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/gisevunatisib-resudubarewuzir-sikam.pdfIn PDF document text
    • http://fogepadive.iblogger.org/asylum_2005_movie_free.pdfIn PDF document text
    • http://healthit.space/63540133797h76vz.pdfIn PDF document text
    • http://teleporttur.ru/sepsis_2018_definitions_and_guideline_changes0evnj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_6011d7c865140.pdfIn PDF document text
    • https://widuboxizivibib.weebly.com/uploads/1/3/4/3/134315701/juxibaxuponudi-waraba.pdfIn PDF document text
    • http://maturibcgj.space/download_virtual_girlfriend_modt8pzt.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/lopeteb/masonite_pegboard_sheets_adelaide.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/sizitilaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/70967625666.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/33274472090.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/bestwap_in_2019_video.pdfIn PDF document text
    • http://vujofif.epizy.com/29556938839.pdfIn PDF document text
    • http://zesixebejifoz.epizy.com/gajinupedelexuliwan.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_off0000d6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 5272 bytes
SHA-256: 35526842056938bda6716f1f1fbdf0538aa694611f950d99d30253023437a3c8
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 10240 bytes
SHA-256: 19cbbefe3fc5a71c122bcbbdd95f296a783d113c8567e0192060b0694b7e482b

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