Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4eb13b369d1de7…

MALICIOUS

PDF

64.4 KB Created: 2021-02-25 02:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9f69c48775cd195771c76f1f427fb3fd SHA-1: 20aef7c0de8b5ea72d8b8d9a264e4627d45181e3 SHA-256: 6b4eb13b369d1de7d3941de3d5dc89f286a9800580607637575239ec916c1fa6
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://jottigo.ru/wix?keyword=mermaid+fairy+tales+in+malayalam PDF link annotation
    • https://puxizabub.weebly.com/uploads/1/3/1/4/131406372/8341943.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/little_fires_everywhere_season_1_episode_4_recap.pdfIn PDF document text
    • http://penageli.getenjoyment.net/will_raphtalia_marry_naofumi.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/4434473.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/49b176c8a.pdfIn PDF document text
    • https://cdn.sqhk.co/lokovipazal/jdjfPhf/disejinizelusig.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/when_do_starbucks_employees_get_raises.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/kosipefojaw/kufumo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/56579158157.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/large_to_small_jpg.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/gerofew.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/snugride_click_connect_30_lx_infant_car_seat.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/nikon_p5100_dpreview.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_off0000c1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C2 5160 bytes
SHA-256: 41d9e62736cff9a552ab74d7f9d1e591a3d6db4eff4ea4cbf2433ed56c02c8ab
font_01_sfnt_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 9824 bytes
SHA-256: 8873102cdbaa788c56fe14c97451c2ef2d23d628867f57832eb223ffd0dce4d8