Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4b79b863319a4b…

MALICIOUS

PDF

66.4 KB Created: 2020-12-11 05:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cf10561a12a5736a18ae567472c1da81 SHA-1: 55a806896e6c9710d796d67adb25e0446dc7b656 SHA-256: 6c4b79b863319a4bdfb942730aa1a9039865ac36ce30d5c57d7bc7dfbc49bcd2
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=igmp%20report%20packet%20format In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469143/normal_5fba75adcb040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485810/normal_5fceddd6743bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417327/normal_5fc9fb382756d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fb97c989fd3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f9fd3ea928e6.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/jitewogoz.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/vinivuxo/xewujuzalalenamolonutija.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/capital_city_gymnastics_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8b7daa-681e-4640-9ea9-ccdead74f130/optical_cable_splitter_3_in_1_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc836ca-7bf2-43b1-b204-89bd47b2cc7c/meyatha_maan_mp3_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/female_yorkie_pup.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/jivuvinusipajid.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/maan_abhimaan_movie_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f918b7-bd32-4277-8bae-d84cff0610a1/19349697519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987e4361-628b-43b6-a596-d226e5266164/asce_41-13_download.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_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 5128 bytes
SHA-256: 4ee166ea22b9173f6ea68e3eafb809c4424f34dfba0aad3ae8e646073e0a27e2
font_01_sfnt_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 10368 bytes
SHA-256: fa749737890bed438283a21573e6b76c9b62be8cf8f7d04a898b5b73190c9e70

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