Malicious PDF — malware analysis report

Static analysis result for SHA-256 df771f9c5f0b17b9…

MALICIOUS

PDF

67.9 KB Created: 2020-11-27 09:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cbbd2767b73320d6125fd4e925610444 SHA-1: 2bb3d70ad1d933fb0550509e37773f24892aa22f SHA-256: df771f9c5f0b17b9cc754d5185904f5524a02933f9aa3048f83132f18a4e8ee0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=trenton+to+philadelphia+amtrak In PDF document text
    • https://nawowelefet.weebly.com/uploads/1/3/4/4/134498780/8866de309ce63.pdfIn PDF document text
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/da0453c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5f90a0d1c8bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5f8d45d82060a.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/runubavo-bodobin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fa2728d4abc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5fbb147d48b0b.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/7e7a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_5fb524e1066c5.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/wenowamopa_berowagelo_lawiwitovevisom.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/vibove/tiny_tower_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/sodoxi/greenpoint_mortgage_funding_merger.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/32462159113.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/16315006048.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_off0000ce36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE36 5036 bytes
SHA-256: 0d896a4af16ff8e01cda0bb00f5ef5c000c214910e3b3aa86532cbaf20dbb12f
font_01_sfnt_off0000df23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF23 10480 bytes
SHA-256: f16722c836b68dcb9556d4cc3baa101f76a53068dd9d779a0ce2b48a584f4d90