Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc92caa50dd59e8b…

MALICIOUS

PDF

71.9 KB Created: 2021-02-11 19:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e2d872f98c5cfc2c4d2b85149e852134 SHA-1: 1f3cabcb892c22f267c5eba5241ddb022128610b SHA-256: bc92caa50dd59e8bb9e36e33e5ab4ad60eac921c47f44d32bfbcbc702a1460f0
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://jacksth.ru/wb?keyword=web%20development%20guide%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5ffa7edc15667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5fceefc0ebb29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_600e38413ddb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409246/normal_5feb4e86f33e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388835/normal_5ff90a94bee7d.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/jgbqhhi/zombicide_kickstarter_abomination_pack.pdfIn PDF document text
    • https://kixaxadamakike.weebly.com/uploads/1/3/0/7/130775249/9f3c4e45179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5fd9a257698d0.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/672ad5d3565040.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/ifyidhg/rolling_sky_new_level_2020.pdfIn PDF document text
    • https://nipapisowoxodo.weebly.com/uploads/1/3/5/3/135349464/4248ab96b1.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/9db7b21c.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/vofadoloves/polotoviwufijose.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/comparing_two_excel_sheets_using_python.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ladifasip.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_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 5092 bytes
SHA-256: 02721e26bd6af476a3c256f837232fedbc0303b17bc0d2828a1657e5ce97d1b1
font_01_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 10708 bytes
SHA-256: d3a69247a6bffbd6c678c048d38fa621b7592a1d1bdd3c7dd96a1db69d04603d