Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe71e319150707d7…

MALICIOUS

PDF

70.9 KB Created: 2021-03-04 01:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1b39ff36b11b482b68813676abe27f1b SHA-1: 3829c9d72cbd0738ce647427ee7e3e58c4d93c1e SHA-256: fe71e319150707d7a4e1ecef4c6047ae9661093a15f635c88254a6a38066d8c4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=how+to+install+glacier+bay+bathroom+sink+faucet PDF link annotation
    • http://detonicufficiale.website/99900340354v1mnd.pdfIn PDF document text
    • https://lowutifita.weebly.com/uploads/1/3/4/3/134352456/zojiwinikoxu_monefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_6001b9e139de7.pdfIn PDF document text
    • http://cmbclientes.com/nuvafisn5kz.pdfIn PDF document text
    • http://dkblogin-de.com/download_unfriended_movieyi67a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5ff0c0ca1a99d.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/89734114827.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/binary_image_c.pdfIn PDF document text
    • http://livirava.atwebpages.com/how_to_turn_on_char-broil_grill.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/71472723009.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/58423828069.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/walt_disney_world_parks_calendar_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/vsphere_client_plugin.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_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 5652 bytes
SHA-256: 82c85c62df5f061e0df16393f982b7a0cc3cc9588b6c7b376c46f4b7f08126b6
font_01_sfnt_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 9932 bytes
SHA-256: 8589f4fad1c4d5186ab7c1092608561937be96a0c58dcd42f8d27d3a0be0fcb6