Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4e559ed501defd…

MALICIOUS

PDF

40.1 KB Created: 2020-11-09 14:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 02fb2c607b6eb21c81ae02791592455d SHA-1: fb4dace98ad9f9679603eacae319566bbdcd06ab SHA-256: 7c4e559ed501defd2fdc8ddcabab2e256172de9957245fdc86d6871bc7f1a5b7
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?keyword=asphalt+8+airborne+money+hack+android+1 PDF link annotation
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/bomovazisobibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f899f623230b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8f59c8e62dd.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/kamofonezelewe-zupedoxazin-tomov.pdfIn PDF document text
    • https://jemeleromonojo.weebly.com/uploads/1/3/4/0/134041090/jopuzimasi.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/d69924d6-4dc3-4ead-bd3b-6e2891a720d2/rapubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710d04c0-56e7-4162-bc48-95b5b566ca4a/87220730030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8af7665-5c57-4245-b951-2fcdf90101c9/how_to_fly_2_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3709044-b68c-4626-be15-aa300f56f86d/13881324904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9fc196a-3983-488e-8f8b-55f6c06a2615/53584010028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d90580a-700e-44fb-9e9c-93c700556b9f/11957486324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c01ce9-e146-4794-9e7c-cfc5b4d1d22f/65563105590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20d94d8-0ddc-430c-b207-50cfa51fe022/fpsc_challan_form_in.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_off00005d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D41 5856 bytes
SHA-256: af05819a4a4cabd7579f0ac8696cade3bb562974f499a5b5424ede7339203da0
font_01_sfnt_off0000710f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 10176 bytes
SHA-256: 368aabfa2f499c7b32360bbfe7b9c4f477037111825734059a9e85dee22c8e70

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