Malicious PDF — malware analysis report

Static analysis result for SHA-256 515c1f208dd034b7…

MALICIOUS

PDF

75.7 KB Created: 2021-03-01 08:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4a363ec1e05ad3cd5a6a323294da68b7 SHA-1: a330a3a1f62340937299f2ef314dcf712651f427 SHA-256: 515c1f208dd034b7ce32ab743d91efd3f7f246e383a522bedd01f071a2d64f14
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/award?keyword=what+to+write+if+someone%2527s+dog+dies PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444356/normal_60013455f1d26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_5fca86303f274.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/ff8efd2b8b93.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/dnd_5e_warforged_fighter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369640/normal_5fe4b5574e345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60199ceba4972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_60241bf2c547c.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/dakuguzolanegejat.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/rumixubixawasosowuzo.pdfIn PDF document text
    • https://kizofirelurok.weebly.com/uploads/1/3/1/6/131606598/8393627.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5fe1b543a3a0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6016c37b7d77a.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/jdpXrMA/32298507281.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/iOgf36B/39836764361.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/pusori/58100436718.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_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 5428 bytes
SHA-256: bf60179a4e35175c197496ab3028163155a36f55b44ce87ab9a3232730bb0f06
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 10872 bytes
SHA-256: 4595f1f1edb9f0e6dfedcb06ff806de917766bae47fa1b241be71e02cf43fecc