Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec16a8bd52a6dd52…

MALICIOUS

PDF

46.5 KB Created: 2020-11-04 06:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a23fbf548c5a6ba19301b76feebd9305 SHA-1: 7fe80c16202bf730db47a9a312241755563a64e5 SHA-256: ec16a8bd52a6dd52527c0853d222cf43a745e2662be2cd84bb2ffea3f4ef1761
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful website. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=which+direction+is+the+wind+blowing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f91aa96d1cae.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/cdb18ba6-fdb0-425b-a918-e2259048b109/44277688673.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/eso_march_of_sacrifices_memento_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/hanuman_chalisa_in_english_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/44242429450.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/rsa_rent_stabilized_lease.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5f49d0-e2af-4a59-a177-2c28d7a8703b/77352216725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6810083-5e0d-4c00-98bc-25d9864ceccb/8688657268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e316b209-aaf5-4989-9794-3f18271c8f27/61057209285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fecf3466-6b72-48c2-8992-2a618d4478d5/golexolezokikekeluw.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/how_to_draw_a_cumulative_frequency_graph_from_a_histogram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92aae3f0-c2c8-4103-9234-081271830b21/purpose_driven_life_day_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acffbe06-2319-4b70-8274-a01f38bcb5dc/85035868883.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_off0000759e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 5236 bytes
SHA-256: e3f188872a389cd95c10588e391785706c32e7b3610ace6464b1bdcbb84d7e2d
font_01_sfnt_off00008783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8783 10944 bytes
SHA-256: e0e0217fe5a8af26c6e6f79891bf8da0e029a6b1643da0a3fb8306fd8dbff119