Malicious PDF — malware analysis report

Static analysis result for SHA-256 403bfb0c19bbffcf…

MALICIOUS

PDF

76.4 KB Created: 2021-03-10 20:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 06823012f4f18dda16a02c76b2d60f02 SHA-1: 0b5a0f0772bb2aeac888aae583d3d83c0e29cd22 SHA-256: 403bfb0c19bbffcf7edcf325a4b594037e9b3e7f4744c590bee36a65a9f28f6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/123?utm_term=amos+24+full+version+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370090/normal_601cfd4ca737b.pdfIn PDF document text
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/7037891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_6005c12899c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_5fd29812ba447.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/volojaxepufisuj.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/jahhjbp/famous_movie_scenes_to_recreate_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5ff8c85169f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_601f24d3e6338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fdee745c3c4b.pdfIn PDF document text
    • https://gitiritibew.weebly.com/uploads/1/3/1/4/131483488/29212.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/DQgdGjb/4668178286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_603d7cd8006cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3c1a28-58ef-40ae-b3d6-e7578d16268e/walmart_store_hours_christmas_eve_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67702642-b7f0-42a7-af8a-39e514a64eac/requirements_to_get_a_ms_drivers_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6084e9b0-3123-4f99-90b0-10ec3956933b/how_to_write_up_a_medical_case_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d503074-44f3-4806-b666-992a1bcc8e63/how_to_get_rid_of_acne_scars_on_back_of_neck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6436e7-b744-432f-ba6c-54e1080d6c61/63998596642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f69f43c-4e08-417a-882c-508641cab659/79996229783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639c17c4-8723-4015-aa58-4e770064e92a/what_kind_of_oil_does_a_honda_generator_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d58ac8-bfcc-4dad-a730-86c4db79ca52/what_is_the_best_class_to_play_in_diablo_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43b7598-24fe-48cd-9d9d-80fa9c655587/38116585584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff76b156-0898-499b-b8ea-9d78a65cbe4a/2793404764.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 4972 bytes
SHA-256: a7cd5a623adbce97887a50b0c27b07f41ec2d60375d9d7310193758360785456
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 11452 bytes
SHA-256: d289cc5b58aa89fba62d3b9f71ff90907d605ff653741ff151b02a89b405efcd

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