Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a542daef0ff4248…

MALICIOUS

PDF

68.9 KB Created: 2021-02-14 07:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 05b895d1763824aea6e236c201da2192 SHA-1: ace3221e74a3931d24fdde2faed5e98854edac97 SHA-256: 7a542daef0ff42488185b0d7858bb2fd764b3a39160640671654a96239370576
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=ddr3+2133mhz+ram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456685/normal_6005633b667b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5ff9246fca755.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fffcf89e75f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_5ff387d9da807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480589/normal_60092d964380c.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/hkhaMxW/offline_video_games_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5fd296bbaedaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5ffa37019ee27.pdfIn PDF document text
    • http://hookup673.site/tribute_to_my_late_fatherb2ky1.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/penale/12655889137.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/49556821246.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/5884213874.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/81555651823.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/notuzuxuxopebomiz.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_off0000d233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD233 5252 bytes
SHA-256: e2caa89ad89128e4d2efc6c1b9e69fb79ef1ff2b2b82b88ae5eaacf751542b77
font_01_sfnt_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 10224 bytes
SHA-256: 482781a1e80ed17a5a58e983ff7ecbf5fc393c72fa8bfda524f98dc6f3c95b3a