Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db0157d070c42c1…

MALICIOUS

PDF

60.9 KB Created: 2020-10-27 10:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 0d3d6691ffc59ddeb0e7a5151d069a2b SHA-1: ccb9067f17f0e39de326125483df9abc0de39d59 SHA-256: 4db0157d070c42c1411ccacf4949d0b1e45332528ccc136822ff7d714cad0847
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://ttraff.me/123?keyword=dwarves+take+back+the+night+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_5f9760667186a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f88b18a1b613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86fad43ccd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_5f8ff1e8cdf85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f96e52a72bd9.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/sojebelevenex/azotemia_postrenal.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/90127573783.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/jijikidaleralepavig.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/22198012246.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/decode_base64_string_to_java.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/tisowovuzugixubasipaj.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/ruvisapolaruronolijogo.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/23080281847.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/84457604886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a913dc-589d-4d27-a73d-35ab50f8f4ea/44620522229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e376e1b0-c1a5-4d2d-a043-17264f5a3f9d/principales_teorias_eticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d162b35-b08f-4935-82bb-d593580ab4be/schema_therapy_a_practitioner_s_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9029f5-50a8-4362-ab83-0c456a06365d/50144993393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30a0c34-9cc3-4ee1-8c8a-13f5c15169d4/43130813587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39efe9a6-3169-45da-97bb-bd03444f5c6f/metezego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235a78d0-e6bc-447e-b4a9-c261446b5c38/rigasonukewizubid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d023be-f9af-4e9d-be01-1d69b5619fd0/79716996979.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA443 5520 bytes
SHA-256: cbd2031e3ba9929c67c92b9447022f5f00129fee3ea541c00afcc213d2beb0bd
font_01_sfnt_off0000b716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB716 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000c278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC278 10288 bytes
SHA-256: 66db223db4199b05ad117617bd8c631d4626513f17dda00470f40bee1dbada71

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