Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda2496b15c40716…

MALICIOUS

PDF

66.7 KB Created: 2021-02-19 19:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0c5930c2579289bdaa4d981e77e9bd03 SHA-1: 7fb65332516a83f351ded041a2316069d83e60e8 SHA-256: cda2496b15c40716d05bc9fcfab8b9b25275987ccf963cdb2893f506c6eafda3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=foreign+word+whizzle+answers+geometry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5ffb96cf0f303.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/Gjdjaji/carmageddon_reincarnation_steam_key.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/zigetubetuji.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/6757577.pdfIn PDF document text
    • https://cdn.sqhk.co/kekoseni/Ljijbig/fenujaxulep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500430/normal_602a70434953a.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/4wexibs/vumorixikipas.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/ihjipl5/wirapogapunijajuserifi.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/fTicH4C/steam_game_download_keeps_pausing.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/xeponodij/29490539370.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/72531106943.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/yaquina_bay_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/astonishing_comic_reader_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/rujarolumisivokununixosar.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_off0000c802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC802 5436 bytes
SHA-256: 9a7afc49d894af85aaaf7af65ecdf25b7c5a8e789b2b74620d7dc67e32689566
font_01_sfnt_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 10380 bytes
SHA-256: eece41a60d02a70043cc24ddb608c333530752429a1f17ae17cb343ff29aed2b