Malicious PDF — malware analysis report

Static analysis result for SHA-256 44350ada5e4d8dbd…

MALICIOUS

PDF

70.7 KB Created: 2020-11-25 19:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f4f532e3df600049c1a1caca7a67f1a5 SHA-1: 3f8da67bb9e82943f0c1028cc69f0e2adc278ca5 SHA-256: 44350ada5e4d8dbdf8064124cd8cc720082649f0bc6a9120894129e75ca371d0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=cafe+con+aroma+de+mujer+canciones In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f9be1e032771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_5fbad65e403ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2b5ed919-b969-4039-bfd8-d19715eb3a3a/7025717406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b37922-e08d-4610-8cee-b2d9f32521ee/vakolomerasik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd584d15-ba2f-477c-8d56-d56b11ef77f6/pdf_de_uso_diario_por_alice_walker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af7c6ee2-2514-49d0-90d2-55e4dd3f977d/examples_of_rolling_friction_in_everyday_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb687c83-15f0-4d4e-8229-934c2be8268e/zipoxawujuwokekumuvudufol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e0268b-c439-4309-96d9-3dcaacd1f76e/pasta_alla_gricia_with_kale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0040795e-0c5b-47b9-a0be-b3295c91523d/manual_del_sacristan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50e30c0-7bb2-4049-8312-ddb8a8396c87/stranger_things_piano_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290f99d2-3de3-430c-b118-23380603f71a/41475938367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626b7905-2792-45ed-9280-a0c30dca9f66/zometejozi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A8 5036 bytes
SHA-256: e49c5c124e7a4328c34579aaf519bd06323896fc2691eb00ef887c47604a35b2
font_01_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 11224 bytes
SHA-256: 26c565c88333660d2de6b642a9cf92fe2c014a2d72ae615014f9a491db9c2f89
font_02_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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