Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc2e74158fe517a…

MALICIOUS

PDF

52.8 KB Created: 2020-10-08 07:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4b89431ae51172896660abfed983d66b SHA-1: edf098f3c2ee862c715809c4f23e5c2d5784fd3c SHA-256: 3bc2e74158fe517a1df22b92571a7fc60643d46e6ad4e4c0a6ce08690585840a
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://cctraff.ru/strik?keyword=divinity+original+sin+guide+pdf In PDF document text
    • http://lapelin.imuamediagroup.com/uploads/1/3/0/9/130969061/kafepowo.pdfIn PDF document text
    • http://files.theplantparlor.store/uploads/1/3/0/7/130739590/97cc3fc4b1e1.pdfIn PDF document text
    • http://files.johnnychamaki.com/uploads/1/3/1/3/131380625/bivewoxitasegibej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d379668c-8940-4207-9b17-7113050b2ba8/pedom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbde8da-f0c0-4e7d-8c85-4750154b963b/xexipur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c166fd-c00c-4dd9-994e-cae4f148234a/96577813423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1297277-d665-4eb1-9ed3-97c75e3f572c/68200422892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4528/9112/files/u8_smartwatch_bt_notifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/black_and_decker_matrix_attachments_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0010/5624/files/anne_of_green_gables_fabric_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd916802-0bcd-4202-9ec9-d21385b90736/73924054875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4414ec0-86a0-4558-b2ca-31672f4cfc6b/48873712037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7739b9d1-13aa-473c-a394-06d465375f94/kovaverizeguvotofivon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b4fb85-6b7a-43a8-87c6-f91723790fa5/tigofopul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000849b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849B 5252 bytes
SHA-256: f786429cd100c5737f231f499e7bb9c6ff83b747a2a71353ff9947621db3213c
font_01_sfnt_off00009694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9694 9836 bytes
SHA-256: 913225417495a691f95ff2733c99359d46b6e25905e08b54bd19b30265a8fce2
font_02_sfnt_off0000b814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB814 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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