Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1442109a5c99cac…

MALICIOUS

PDF

40.3 KB Created: 2020-11-05 21:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41e9cbc6ff818069a5d9534e7774f0ae SHA-1: dd7609df08478cab0508af5be03ff054da31f8be SHA-256: c1442109a5c99cac3fea40ce05466a39529e0cc550b0c4ac1dbcaf0eb0e6a99b
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?keyword=bedford+county+school+district+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5f90b77bc32e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f965c714a63c.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/aeee7d0b-d233-489c-8b12-66104671d567/spider_man_far_from_home_putlockers_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8776ba-fb19-4889-ab18-ee93512f19b1/gisesimulalarexowonomomol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b67fa01-085c-4e5e-b0f0-3bfb5460bfba/5369457798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c69662f-9ef1-466f-b50b-2f0874f692f3/xonazege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8f70c2-aa63-417e-837d-56384df3d6a5/westell_modem_7500_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2638918-5375-4ed5-9787-5b4417a9d538/dragonball_z_devolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426fdc68-9587-4116-82df-8861a59e05f2/42322686621.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/64292022152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19c5482-a77f-439d-bf57-277070d82b05/order_and_chaos_tailoring_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30efb45-a9b5-4abf-8126-dbd7166c1292/rajevefilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b736daa7-cd59-4259-b2db-aac06c104233/neutral_safety_switch_replacement_chevy.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_off00005d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2E 5396 bytes
SHA-256: 519f2d775cd1367f7eef4f20a691def2c05057e23ba982bf4518f4ae35425248
font_01_sfnt_off00006f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 10824 bytes
SHA-256: dadfc6ed6d75d0c7bb88974dfe52b9a26104761fe4909cec5a7b8aa541cabc5a