Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e2e179713d04d1…

MALICIOUS

PDF

50.6 KB Created: 2020-11-04 23:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0a49afc452895176356b960112653fcb SHA-1: 07f32081d8176d4e28d0eebbed2f3c3d86aea9bf SHA-256: 91e2e179713d04d19763c136553b692ddb9b20fc6c94da56a2b7b518806c5d26
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/123?keyword=remington+1900+serial+number+lookup In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8fa4ed535d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f9a57e4e2a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f872e4dce418.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/lixuzo/gepivafizaxak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db753dc-d473-41ce-81b4-4a06e8aa3419/juxajisevufovidovunatirib.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/downton_abbey_jewelry_macys.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/nabad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d57439-69c3-48fb-8a1b-dd0279698a57/53050885947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16db2452-804f-4a3d-91a1-5ebd69d3a0da/37734191030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b6c9c6-31a4-4f9d-b9f8-00530676a2aa/lolepujokazagu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/hp_top_of_the_rack_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe81e97-6105-48e5-920f-1b02d7ee75a8/zoderaligewige.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009991.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9991 21400 bytes
SHA-256: ac491758a9e525eaf39b5017ef3893c0fe4796161e9d3450b3faa52751856dab
font_00_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 5700 bytes
SHA-256: 7d74d68f7467d761595caf032df48f2d03d8451624a36ef60098ee5a7da9e5b7
font_01_sfnt_off00007753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7753 9912 bytes
SHA-256: 54afd5162f38a3b62837e10fc75a72769a218d44d8cc2e44ec6daab70e12b1c9

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