Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b663ee2cce361f…

MALICIOUS

PDF

57.9 KB Created: 2020-11-05 16:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3b3a29790b56f6d4406b5c079280473f SHA-1: 29483bb020deea9d3a6ae2fb05933387bc6b9a13 SHA-256: 54b663ee2cce361f831ee38ba406ed76b74e065f65104787c86c08841d9639f8
156 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=rod+of+rulership+pathfinder PDF link annotation
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/9973980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f900e412ad80.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/larupuvuwiwiwefatijo.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/pamebu_jigegiverugu_fozoj_birifuramirez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_5f8f70dc0821e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f96d1e4f31b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_5f9d9c625bd74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f9799ab36d95.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/rawuzojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f894a3b806ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5f9200d54c3f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ditiruz/74045709036.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/in_search_of_lost_time_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/zoxezaxenitiguxovu.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_off0000a46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA46E 5136 bytes
SHA-256: c2faf3f82a1a3db04639270ee6b4ad48ae99fcccc43527c88d6c58f3354b0bb1
font_01_sfnt_off0000b5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E3 10968 bytes
SHA-256: 8aad55464f1ec72ab265bba2e4e4f478c264cf4f2e1f31a06c9e5bcbe07ebaf9

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