Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e78a95f07a3a586…

MALICIOUS

PDF

37.5 KB Created: 2020-11-04 21:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 697be3daf814cd0cfedb9c65f0ca8f4d SHA-1: 766f0a063d70f6b523671615e5b19074842ae7db SHA-256: 6e78a95f07a3a5860cfd18a5278e5e6e4a0e50e1eb7c4b2c6a22939726ccf1a7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.club/123?keyword=lab+2+sales+analysis+worksheet+excel In PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/9883315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f883a7ac55fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f88283a1cb6a.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/venunamazozuzo/st_ansgar_high_school_iowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766f59a8-644a-42a9-847c-21823549258b/little_tigers_preschool_bay_minette_al.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefc2388-6432-4092-b351-4a4561a059f6/wonepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51dfd09c-7800-4eb1-939e-e2bb30caac84/77410905273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbecd91a-1c00-43b4-a6bd-5f6c8823cef7/95692478138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6aab3e3-29fd-4091-9df7-2ee4d6b3de34/74541199877.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/sandra_leong_md_psychiatry.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/quadratic_interpolation_method_in_optimization.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/fivajidaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/rail_budget_2018-_19_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/plano_7771-01_guide_series_tackle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7441d59a-14a1-4fcb-be17-107ddf83e6aa/20188714535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef01359-d7a7-44ca-a83b-7976ca37d256/37310103523.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_off000055ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55AC 5428 bytes
SHA-256: 76e601758490bce4ada31451771e25605ad87c109e6f2195a3451a648b112cb8
font_01_sfnt_off0000683b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 9620 bytes
SHA-256: 9148a8884697f5f7a23fcdfa1d0cf27f6700c37a26919ac64244e06ad99d0c89

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