Malicious PDF — malware analysis report

Static analysis result for SHA-256 587b94e773b9068c…

MALICIOUS

PDF

57.7 KB Created: 2020-10-08 08:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5a2dce861303ca74cd2d0fbeed753ce0 SHA-1: 39859fd543ded64dfcc422d43b80ac12bff7596a SHA-256: 587b94e773b9068cf85424b71b996ad9e4030fe0da7c3022eeab4012e133985e
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.link/pify?keyword=mca+motor+club+of+america+como+funciona In PDF document text
    • http://ruraxaju.candicechristie.co.za/uploads/1/3/1/1/131164312/ba27158e70bf71a.pdfIn PDF document text
    • http://girivu.yabraff.com/uploads/1/3/1/6/131606457/tejazujimot.pdfIn PDF document text
    • http://files.konishi-kg.org/uploads/1/3/1/3/131398225/wozafugasufuwemak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/70202687307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/mcgraw_hill_science_answer_key_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/digoliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2606/6851/files/23355314008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a561e6d-05f1-40a7-9fbd-7e7637e9f7b0/60901721303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9132df7-b482-4b77-8418-8e0ebc4ac118/xewojepowomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543cf995-2892-4ee2-93e9-143ea44a8875/kutik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3cca6e-9a7e-4fc6-8904-f8beff894bf5/telujupalabibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4a4c9b-ecc0-41f3-8c02-ee6c8aec43f5/31279877173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b50580e-9f39-4c80-81a8-e61350e9887e/xirakibuvijipuduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6e7a1f-4e66-4111-a014-a88b1657129a/mijod.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAE 4992 bytes
SHA-256: 1ce7cfa39a9d7113248ddf8c31dd0884c088c58091626aea2ae2a1e70d3f5a3e
font_01_sfnt_off00009ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA1 10656 bytes
SHA-256: 13032d068e82610696aa1de0092e9ac64a6d48cb26a1a513b8a434604e49b884
font_02_sfnt_off0000c339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC339 16660 bytes
SHA-256: 0b4f9904cc63eeb245c31300081beae5dd130040598f84ad13cd294c90142161

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