Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f52a699b94eab0…

MALICIOUS

PDF

55.2 KB Created: 2020-11-08 15:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 976e9c6f9da28946fce3f338f491aa8b SHA-1: 59ffaac26b711ee4e480e4f23137daccf16bcd5e SHA-256: 01f52a699b94eab0f8596de7da908b7712a3234de29a97b8b2a32868b018d274
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/123?keyword=bee+swarm+simulator+codes+july+2020 PDF link annotation
    • https://nixuxani.weebly.com/uploads/1/3/4/4/134433038/fexuxev.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/meletopadolavuxutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f9f910d522ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8b79446beae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_5f95815846c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f928b692a608.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/zujiworawubobuwidopi.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/zetare/zodegubitixatirupuz.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/levusewitajiga.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_off000094cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CC 5680 bytes
SHA-256: 93ffaece83569ab6cb571065744cd53bddbfa1c66c06d1d32a8f397628fdf2a8
font_01_sfnt_off0000a822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA822 12308 bytes
SHA-256: 7678a94e801bd88326c530b9d1d02e69b600e064b4ee4f0247dc8c18938fb4b8