Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4723633b52f541…

MALICIOUS

PDF

59.0 KB Created: 2020-10-28 19:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: df2011e498aaa62f533fc2029a8502ba SHA-1: e642dd585292e15e0e0417b98e1c33e87b992f37 SHA-256: 7e4723633b52f54111de9c40f4fc8b837dd8272981827b3803e47dc29e2b4249
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?keyword=engineering+mechanics+of+composite+materials+solution+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f88ec44c3f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f976e58a6d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f86fe6842b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f908d818682f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_5f8da6be30831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f95e49f2dd61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5f8d8174afe51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f991846da0f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421224/normal_5f993d7b4ef52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/39dfd6c4-8d6d-44b9-8c11-60a1130d60fb/65667519086.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/zeretugatirizi.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/last_6_months_current_affairs_in_english_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c8d299-0e49-4bcc-88ee-cc049aab99cb/pifivul.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/45899372917.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/96467575140.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bhagwat_gita_marathi_file.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/juxazojerixaxebetomi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/lajijenirafawovafi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/11346104281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f5348d-9fc0-4112-9e6a-1519433d1640/63492293476.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/canterbury_tales_knight_s_tale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7f847d-7b1e-49cc-a16f-c5b9f403d791/semikixako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa58629-b987-46c1-b278-7fe18266520b/tujemiserawoxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246c30ab-6558-4a41-a000-01da36c0747d/28252543076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f08b8d-854d-48f3-a723-53004733b0ee/nalogakumubawuronadogonos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f9f9a1-0f94-4c18-8b01-a21d88a8863b/11761796074.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/australia_map_template.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_off0000a41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA41F 5524 bytes
SHA-256: 6f30d42be0bfc1c4e260260b8dc05565e53c1dd4a6b984a9be54318627f02052
font_01_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 11552 bytes
SHA-256: 36be0957a43b031afe0579ba442161b545e9003ab33cead20a6419b8e1437c74

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