Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f413f220b06d053…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 00:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1b354a5f6d498ab8b2e25f757aeb9c29 SHA-1: 9d2a9ae17ef7b0a1623e32cf6957d87d7cf7583c SHA-256: 2f413f220b06d053cc3fbd76732ef6dbc2855bc08b220ed75c92396374a94e14
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=george%20foreman%20grill%20with%20removable%20plates%20and%20temperature%20control PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5fc8014c435c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5feee64937dd5.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/93325319412.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/dutapapufizesadesi.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/7781281.pdfIn PDF document text
    • http://lipoviwevaja.iblogger.org/bedowinavuvaturaxasu.pdfIn PDF document text
    • http://segikusi.22web.org/baloruzulejexeru.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/gidibesuxi/nokedurezixipafizojim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85afe12-25b9-4623-b277-68fe3c466f4d/singular_and_plural_nouns_ppt_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/74421453654.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/97848731743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2314ac10-ef2a-4cf5-b077-dc0b2ff83e52/24434019360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c5632f-a8e6-4b58-80e1-9c38860233ad/dokurosupovuteligisememul.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/business_information_systems_degree_worth_it.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/26190977348.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_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 5892 bytes
SHA-256: 14d025c2d6496238b825bb47cc746187d31425d08f874535f9a46574176b4e85
font_01_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 11796 bytes
SHA-256: 73e97608721698f69d7ed5476db10c852aa204c9e3d9fa20649dbf9510cb1808

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