Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe41cb29e346449b…

MALICIOUS

PDF

46.6 KB Created: 2020-11-06 20:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ca8edc33ccb48c4261a674a61337565d SHA-1: dfa442eb2f8bb3133f7bb90b1858871818e452d7 SHA-256: fe41cb29e346449b6f9078386b6622a6128b2495f758690fd4499797ca3e0c4b
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://trafffi.ru/aws?keyword=piano+tiles+2+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5fa024d890bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5f9b5e28ae8b9.pdfIn PDF document text
    • https://pudozewo.weebly.com/uploads/1/3/4/3/134311846/d2c80aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f916fb84eb51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f8c2d875f74d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f93d74d56621.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/zobisuzejazuzujuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_5f9ec3e736f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_5fa38c09264f9.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/210709e6-9f0f-42e4-af22-3a1a371e0bbc/54818902259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a8e56f-644f-4c02-9418-3bebbd053840/lusezosijofaninaf.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000636f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 5208 bytes
SHA-256: a5559d8e4be116926d81ced587fa1f73e7ec3873eb9eaee95096361c960979a5
font_01_sfnt_off0000751a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751A 9940 bytes
SHA-256: 11e9d8e44d070727c8b98756668271f138b97797f61ab7a27cb37804b12ed6f1
font_02_sfnt_off00009753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9753 16468 bytes
SHA-256: 1045d4f2d0039f7437e6ff6fa8358f2baf8422ee8b751cc30034a0c4a4da4026