Malicious PDF — malware analysis report

Static analysis result for SHA-256 da308fec077a494d…

MALICIOUS

PDF

41.4 KB Created: 2020-11-05 23:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: de176cd2909c1a913067134b8e13b890 SHA-1: f108c863629804cb70ad43289559fdf7289c89c4 SHA-256: da308fec077a494d64a880eccff7a7cafa5251f0436d6add4132ec7ca377a1e0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?keyword=putlocker9+hd+movies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5f93ad86bc867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406785/normal_5f9f111b2ec5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8c57954ec96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f964516d61a3.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/79c608520.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/571420a6-b22a-4448-86c6-628ce602caf5/90277063462.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/hydac_clogging_indicator.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/83532675600.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/gizeluvogexirajejamavul.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/piccolo_dragon_ball_z_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/rosario_de_la_sangre_preciosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7ea9bc-d04a-40cc-8d72-e3ebd3f9e54c/zootopia_audio_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/34915365652.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/ielts_writing_task_2_sample.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_off0000554d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554D 5028 bytes
SHA-256: b0ace48db1a69e736b24c55730433c9e01c49653c4846f886f94b403d8ff0041
font_01_sfnt_off0000666a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 10680 bytes
SHA-256: 70c45022dc5c1934340f71b715c1d54575e784ba88c6165273e115e4ee4faaac
font_02_sfnt_off00008abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABB 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230