Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff638ef1aa8cc46f…

MALICIOUS

PDF

69.8 KB Created: 2021-02-18 13:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9698d66ee82b008f4195732694d59318 SHA-1: 8e47d9ba91726c56b9c7f618f035e49e20090275 SHA-256: ff638ef1aa8cc46fa742ad84f0c40f6da9aaaa604280716b76ddf564d0956730
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://jacksth.ru/wix?keyword=dewalt+dw718+price PDF link annotation
    • https://cdn.sqhk.co/dawajimet/hhD6gcE/fireworks_artillery_shell_tubes.pdfIn PDF document text
    • https://fikejibin.weebly.com/uploads/1/3/4/3/134331262/669d2e8a0e0677e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506131/normal_601b561eac46e.pdfIn PDF document text
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/xupemewu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/cIO0ic7/tower_defense_crush_hacked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/fjhvgiW/online_general_knowledge_quiz_with_answers_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/dumotometapo/ihgehaB/weighted_jump_rope_melbourne.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/nutanigonu/au_bonheur_des_dames_texte_abrg.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/2382471331.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/32412603871.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/netflix_tv_shows_india.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_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 5308 bytes
SHA-256: 94089373dea7e473ba6867d9cc82c789d492a27d1536b97d5941eb9a3e158853
font_01_sfnt_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 10516 bytes
SHA-256: 588ba0707b5f408f75e82b0f0731fa9a256176bb354214a17c2c2bac88316656