Malicious PDF — malware analysis report

Static analysis result for SHA-256 55afc3b4c7cddcd6…

MALICIOUS

PDF

70.8 KB Created: 2021-02-11 15:11:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 490062c3ac9891af0dac4b86e8f7ab20 SHA-1: a937768ab50568c1ced8a93fc7d5d246e118d6c7 SHA-256: 55afc3b4c7cddcd6031146bc35faa2362453497123e38712875bd3ef9e8318f2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/123?utm_term=twisted+tales+snow+white PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5ff2d55a63452.pdfIn PDF document text
    • http://domavera.ru/dekudono8mfcp.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/gggfBig/realpolitik_game_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_5fd92b1337f59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_60039c585eb81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5ff0ec1fa5afc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389370/normal_5ff6c5e7d0817.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/ieTgihO/pavalarusibizogiruwefid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5fd11d9559a6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378390/normal_5ffa16554ac39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_5fe76e74b1df3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_600a8be3e9c27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakilapawunafep.epizy.com/mivilagilovolezukotul.pdfIn PDF document text
    • http://xarozitapakegur.epizy.com/keep_track_of_spending_template.pdfIn PDF document text
    • http://lekugonaj.rf.gd/9361126165.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_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 4860 bytes
SHA-256: 9e6484166c9cc97b613243d7e9ad221f3d59a6582b0fa9e999e284097b1cbda0
font_01_sfnt_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 11112 bytes
SHA-256: c17bdaad82e7b80dae0ad1ac2c278105415a923ab599f68268b46d84443e0f87