Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa5d7c8a47ddf7e…

MALICIOUS

PDF

45.4 KB Created: 2020-11-08 00:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b416cc77b854a5b0ae0e1db41ccece01 SHA-1: 952496054196f27c4e578b45a798fe7d35e6e2cb SHA-256: 5fa5d7c8a47ddf7e2b3229ec0e56826a6773e1181aa2b39483b339b7c824975f
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://trafffe.ru/aws?keyword=download+geometry+dash+on+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f9cd8084f142.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/lezigobafodefegep.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/kekobimosekuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f9ad11422d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f86fe8792ea3.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://s3.amazonaws.com/xesigeze/5919393490.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/pioneer_deh_4400hd_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bijafavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6cd0ae-085a-451f-957f-fe0f0a7f27b8/gikexomidaxomexinawo.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/fowiburobomidononolotum.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/standard_brownian_motion.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/hemp_necklace_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/jutepexo.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_off0000666e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666E 5368 bytes
SHA-256: b71cbd723b857366a02ecbbe050afbe7dab7efe4ca2741ee2c8c555e7bbf99be
font_01_sfnt_off0000789d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 9844 bytes
SHA-256: 427e32b8f9885e8523092cda127b0da3a95e065391dc4b14539294b7ff3d3cc8
font_02_sfnt_off00009a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A42 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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