Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f2afe2f35e875d…

MALICIOUS

PDF

51.4 KB Created: 2020-11-05 23:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cbadd4bc7abf10744f21d9e9bd20d053 SHA-1: 2425b45ce63b5c7c2c8024cc1ae9eb1cbb5d4c5b SHA-256: e6f2afe2f35e875d35416baf016dbeba4256e6ee4e524937fd20cf81541f3898
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://trafffi.ru/strik?keyword=download+games+unblocked+at+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f8aa826bd758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_5f99d86453cb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f902d7cac523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f91ba248b30e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_5f98956422f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f8b303d643c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5f9d480561113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6573/9930/files/final_fantasy_x_sphere_grid_differences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62aa0bca-7423-4f44-a757-8e1526767471/temetonilikoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d019cb-cb13-4b0f-b139-2bb40d6d9bbe/vefosurarovotadoxujum.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/wpial_football_scores_10_25_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48f7828-a590-474a-b436-94ad25b9786f/limubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8274/2950/files/niramivepidemusipuneg.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_off000088ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 5552 bytes
SHA-256: 3130795bed129ed99d7714b3f9fce7629c0d5750ff8195c9c3fd7358a7e3752d
font_01_sfnt_off00009b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B95 10732 bytes
SHA-256: 038d9c33e21fc4ccc7b96a1cde7fc6ff3ff82e2a7809071f40299acd629efec1