Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99d69a4d3922a1b…

MALICIOUS

PDF

67.0 KB Created: 2020-12-31 06:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2837bb434af39c0f8cc52320d48ebb4a SHA-1: 21ef666b11112910e7881fa26c4f5f42153cff00 SHA-256: c99d69a4d3922a1bae1ca8fa88659da3a084a47146ff6816a5d306d4b8f87d44
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://trafftec.ru/wb?keyword=reborn%20in%20a%20magical%20world%20episode%201 PDF link annotation
    • https://jadigitunuw.weebly.com/uploads/1/3/4/6/134672933/5f1a6fd6df.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/NKmzhfz/nuweluludek.pdfIn PDF document text
    • https://cdn.sqhk.co/wepenujofow/cheghia/95465689791.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hfWscgf/vatasazajegixaxivu.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/381a95.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/dgiijR9/piano_keyboard_stand_furniture.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/aEVhhgf/farm_frenzy_inc.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/hITjhbm/78936116090.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/jolituzoji/nozidawemirafitam.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/38141392809.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/combine_information_from_different_cells_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/laxalajujogerom.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/impact_effort_matrix_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/41595593821.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/myles_munroe_free_sermons.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_off0000c71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 5684 bytes
SHA-256: ee27b4c57fc16f19929ce697de5aa901c2abc296526ff277e1fa06d9a46f4af2
font_01_sfnt_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 10840 bytes
SHA-256: a4d1b45a8cccae68ac07892d95c2e3dc3c67c1c55494ef15cec038faa26471e6