Malicious PDF — malware analysis report

Static analysis result for SHA-256 974547840aedf56f…

MALICIOUS

PDF

85.7 KB Created: 2021-03-31 05:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 75df3d6050c715cda97691c2034c2c3d SHA-1: ec0e8e5e8516dc854ddb0772ab355aea078a4217 SHA-256: 974547840aedf56f0b2d41e5c8e8a3412c9ae9c63bff59151121563f522e2a0b
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. While no scripts were extracted, the embedded link is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/award?keyword=ammonium+sulphate+precipitation+chart+pdf In PDF document text
    • http://duwadomet.22web.org/67184263034.pdfIn PDF document text
    • http://sakepugikunon.mypressonline.com/eclipse_cheat_sheet.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/93261139629.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/descriptive_statistics_journal_articles.pdfIn PDF document text
    • http://circus.market/janes_fighting_ships_19411u9fy.pdfIn PDF document text
    • http://tertov.xyz/computer_organization_and_design_4th_edition_solution73x12.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/20_theories_of_disease_causation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mamibis/7912850569.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/mujofotasesem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271739ca-e20d-49c7-a504-697a73bd850c/digaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/47084735698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a88314-0b3a-4194-8c70-279b357cf159/what_does_dog_symbolize_in_dreams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ecea2e2-ec5b-4792-962f-8ab6e4394e70/detotuvikexa.pdfIn PDF document text
    • http://zuputes.atwebpages.com/psychometric_success_numerical_ability_reasoning_practice_test_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d185792a-79ff-4a1a-a808-052b9c21af81/can_you_tell_gender_at_13_weeks_4_days.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/peseri.pdfIn PDF document text
    • http://mifijikamipupu.epizy.com/how_to_do_a_backhand_serve_in_table_tennis.pdfIn PDF document text
    • http://bojuzafi.rf.gd/95106487367.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/until_dawn_trophy_guide_walkthrough.pdfIn PDF document text
    • http://rawijubewivakom.rf.gd/apple_support_email_with.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_off0001126b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126B 5384 bytes
SHA-256: 6f943987b3db0a28f8a87da04b835518afe47436ed7c1be5ff0050f03bee22cd
font_01_sfnt_off0001248d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248D 10896 bytes
SHA-256: 92df9084689015f9cc6e56fb18dc7348ff6d73963d589e8784919272b8d454eb

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