Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7854c2c9f376e0…

MALICIOUS

PDF

72.3 KB Created: 2021-02-23 04:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 21558e6735526e0a21e9f45f2e43671e SHA-1: 7a8ee05b208ebb23ceee89b8b27366286260ac56 SHA-256: 3d7854c2c9f376e0d1e02575c9460cc367d4ab251b4fc653888936b857b45900
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://maypoin.ru/123?utm_term=lenovo+t420+charger+65w PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469623/normal_6022c56bb111d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc8d5dfd85fb.pdfIn PDF document text
    • https://cdn.sqhk.co/zazifutunoj/eJlhcPb/cool_ping_pong_trick_shots.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_6005ff1ded0fc.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/jcB7jdG/80567788353.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/iiDjhjb/gotolixijibeguwotomazen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_602e39a95b283.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/dudurat/reading_comprehension_worksheets_for_grade_3.pdfIn PDF document text
    • http://zukizibukuxupir.epizy.com/70857086428.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/95362589176.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/91019119207.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/71279960107.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/free_weatherbug_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/nulovatifojalezuluruse.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/gebab.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_off0000dbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE7 5584 bytes
SHA-256: 2a4c1b1448a8a49bff5088d4948a1293f151fd390289a050c10dfeb0192ffec1
font_01_sfnt_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 11068 bytes
SHA-256: 6e32d9aed715cf91e517fad901e8b4ff1fa2b23c20134b424abd641a151f4c86