Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b18615e4c4c919…

MALICIOUS

PDF

66.9 KB Created: 2021-02-10 17:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eb22078ff57f688bbc2a21c92b73550f SHA-1: 485c5140320d695fe841dca5bc08b9d94377ceb9 SHA-256: 24b18615e4c4c91908f50d166c3e5f530b5998dea04c10456295d1bec63981b4
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://leonvi.ru/wb?keyword=bahubali%20the%20beginning%20full%20movie%20malayalam PDF link annotation
    • https://cdn.sqhk.co/xezalagefog/hjsGhdZ/what_you_apply_for_job.pdfIn PDF document text
    • https://jirozonuk.weebly.com/uploads/1/3/1/6/131606844/ed33af258812e.pdfIn PDF document text
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/kukufap.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/ZPqDf8X/parukoraravaj.pdfIn PDF document text
    • https://baxufolodamiz.weebly.com/uploads/1/3/1/4/131408032/7897788.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/ie2jgmq/34792051336.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/ggghdid/vintage_petroliana_signs.pdfIn PDF document text
    • https://molilavavabofu.weebly.com/uploads/1/3/5/9/135989114/9771580.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/tikofaketonub/falakorilalojupunebidoga.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/hsbc_self_certification_form_hong_kong.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/easyanticheat_cuisine_royale.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/payzapp_old_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/bottom_navigation_bar_android_height.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/kijukoxakazodozoka.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/balsa_wood_sheets_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/a5_size_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/industrial_buyer_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/57637549759.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_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 5256 bytes
SHA-256: 3869e1884c2c52a01c285b86ee6cf7bedb4fbea2d939f62d588800115c354eb0
font_01_sfnt_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 11116 bytes
SHA-256: 5568b8856d7ebc91a8b6f4dd2d7247512b4dde222916fd5332a487b415fe567b

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