Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7623cc33d45925…

MALICIOUS

PDF

72.9 KB Created: 2021-02-26 00:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6f8ec1327f416da964cf84a5eeed5d26 SHA-1: 9c5946c941c35e5b5b34ead412834fa1bd22b619 SHA-256: fb7623cc33d459255e8dda4d080a4e37b800fac6309a56344890f373ae61b87e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=logic+of+english+phonograms PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601779940d376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fd2250a75842.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/ejh8Rie/lodazozujigokozizixekuso.pdfIn PDF document text
    • http://prosale.company/kandidiasis_mukokutanju1wi.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/3jc3rWn/89770715946.pdfIn PDF document text
    • https://cdn.sqhk.co/piwoputi/hahjjdr/fewoxeb.pdfIn PDF document text
    • http://legendarycraft.ru/sufaguderuvozusnq1aq.pdfIn PDF document text
    • http://legendarycraft.ru/pufuwupuln0j3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490129/normal_5fc80adaa1c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_6020bd0dd6acd.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/heArgiP/60973507647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_602a70cfd56a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5fdae82cc8c33.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/h8AWQZx/fifedone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://murarefap.epizy.com/vabozedikeno.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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5372 bytes
SHA-256: e0837a6d9606ea420082ede258c340dc4b5a8a3090913a20258002116f8434ea
font_01_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 10332 bytes
SHA-256: 87c0814a836dcc16169925babe90e85bbb977811da82dd7e5e7891a52088179f