Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8c2a2a8c5e6c5d…

MALICIOUS

PDF

70.9 KB Created: 2020-11-18 17:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09d2a3bea87ef611ff432870f7ff5b48 SHA-1: 39137dc33cc02c7b977f129238449025af64f6d4 SHA-256: ea8c2a2a8c5e6c5dbc99b50226353a83a3e4b1ee10722f4170da84de1c6f05ef
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=dividend+growth+rate+formula In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f98c9b87a7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5fa7dfb900117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f9c051b2c315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fa4aa1f04c53.pdfIn PDF document text
    • https://mukokoloraji.weebly.com/uploads/1/3/4/1/134131612/779218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5fa51663c2885.pdfIn PDF document text
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/25d9082ea4f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_5fa09a4aaaa23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc6a82a-4354-4cb3-a31f-7823a9ad1c78/rapetolotezidudurazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e199bdf2-c53c-4389-a194-5c87d701b109/mtg_premium_deck_series_slivers_decklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728f179a-55a4-443b-8945-ba5fd054d76f/tezevofopuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4898fcad-6ab5-49d9-95ff-b678404d07a8/roropar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861713c4-54f9-4855-a006-e836df68f44e/tigaruzuwilotarorikubeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60fc1b6-037e-4f72-b420-db05eee4c46b/alexa_voice_commands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253b140f-4608-4263-87d7-34fddb194a39/guiders_mission_tours_and_travels_ernakulam.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_off0000d770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 5296 bytes
SHA-256: 5e018b4a92801afdd51d793eb7f6e495f5e40df30d37fd18d61fe60e7f7f7a79
font_01_sfnt_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 10972 bytes
SHA-256: 403fea940d853d09ab42c1191d0bf74534272e36552313e151444bce05fbd916