Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a2fb6a3513ffba…

MALICIOUS

PDF

71.3 KB Created: 2021-01-02 06:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d3891d762a54ef8c1bd058f1b2d4de44 SHA-1: 1babea9b60026d7e72f45b4ed7a98d7e9f4655a6 SHA-256: c1a2fb6a3513ffba8c2db781477f06268173e6856270ec9edf943c3c2da8728c
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://trafffi.ru/wb?keyword=call%20break%20multiplayer%20game%20download%20uptodown PDF link annotation
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/fiwun_pefiviwivew.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/hijTiev/37452758713.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/iigifMY/remote_graphic_design_jobs_san_diego.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/bedole.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/Dijjhfo/decision_making_xbox_games.pdfIn PDF document text
    • https://suxutusebosogu.weebly.com/uploads/1/3/1/3/131379987/9716940.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/EhhjAw6/xbox_series_x_for_sale_target.pdfIn PDF document text
    • https://satukaxel.weebly.com/uploads/1/3/5/3/135346341/8088544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7074e348-9715-48bb-9bdf-56dd782cb6e1/the_managment_of_grief.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/angkor_wat_tourist_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/arabistan_vize_bavuru_formu.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/bimegexub.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/dixabam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963124a6-c23f-4ea7-9a87-e234a9c99399/nojiroraderetojawune.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/1432096343.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_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 5404 bytes
SHA-256: c676f2716c324d1f441bfb3338960538eac4640ee5375b137a87c20df5b1316a
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 10776 bytes
SHA-256: 4ba7df9c1673c6dcbf27b67c8e45df7ada59730a1f7eff7ea0bd627d1b36d16f

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