Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bb55db43e50bb3…

MALICIOUS

PDF

45.2 KB Created: 2020-10-08 09:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b4d0a8e2ca9936f499f808b7f8c1659 SHA-1: 3a78c4609a010b1737c4f0e890161c296e7a8177 SHA-256: 76bb55db43e50bb3d897cd6a3d5fa7e586d5c67ff9b6cc7568b5d270494dcdc9
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?keyword=the+complete+adventures+of+snugglepot+and+cuddlepie+pdf In PDF document text
    • http://nibevitan.thepeoplesroaster.com/uploads/1/3/0/7/130740164/82ca595.pdfIn PDF document text
    • http://files.pastrytreatsco.com/uploads/1/3/2/8/132814073/mepaxasetexu-kidaxab-fabalobixepew-zukerukug.pdfIn PDF document text
    • http://files.banglauniversalsociety.com/uploads/1/3/0/9/130969885/8486579.pdfIn PDF document text
    • http://zuseru.heartoftucsonart.org/uploads/1/3/0/7/130739344/e781fddac9.pdfIn PDF document text
    • http://files.ocalasgoodlife.com/uploads/1/3/1/4/131453861/8da70dc8.pdfIn PDF document text
    • http://files.preppedandprimped.com/uploads/1/3/1/8/131856339/wosefe.pdfIn PDF document text
    • http://zapotub.olgaklosowski.com/uploads/1/3/1/8/131871761/ce59252a2.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/1dd5aa6f-9be7-4ec5-9035-5e6dae138dc4/jixufonugorurigidanelovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f8e5d3-2296-48ec-bf3c-d001f969895e/mefase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a2e6fd-46c6-46cd-9584-19c80b8e559d/poberabemetoduzarapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afccd22d-7bf0-4f17-8320-8f4084d05ece/98684840358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30e1a07-01c0-43ad-b03d-e935443b0130/dadepidekowinedavif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610f48fb-691a-46d4-a23f-9987d292beb3/8755006617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b335f4fb-550b-4308-90d4-97f2063aef6b/vinegugisifuponerutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68188cd-9a30-4b08-9bea-f55e79db5ea3/84319719849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d87a42-be25-44b9-a543-c2e74b4c2692/bokemerenejitozobusoliti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b606e83-27d7-40b7-85dd-08b5c9b5c32c/27678984240.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_off00006509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6509 5460 bytes
SHA-256: d51a3700dad0d53634d6d06f21067588fdbdfc155e158acd9fd7ffdce2174124
font_01_sfnt_off00007774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7774 9948 bytes
SHA-256: 3557a7fea36718cb267be29badb3e22e8cca0cb20cb9e30e5a82c21ab07a7579
font_02_sfnt_off00009978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9978 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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