Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f29e696923c186…

MALICIOUS

PDF

44.1 KB Created: 2020-10-27 11:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: efdc529b3c5f5661553fb1ce3d3fae72 SHA-1: 902620bbdcd94c378723f0d325efe3e6ba313bb0 SHA-256: 26f29e696923c1869e28d85e871150b88feeb7fc95d9118e5d85bf01a2682445
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 URL, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, suggesting it is the primary lure. No scripts were extracted, but the presence of the malicious URL points towards a phishing or malware delivery attempt.

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://ggtraff.ru/strik?keyword=norton+anthology+of+english+literature+major+authors In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f90796991a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f89ef22e699f.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/18162301-9222-41e3-90f5-b3733ad9abda/jimatebasuretaxona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa1a7d0-2a79-4eae-84e1-966717706193/22630150528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2678bf92-452e-4610-96c9-2ecc67d8d07b/loxinadusilopakojisufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132f77e2-6661-495c-a49b-ba69395d6f08/26928892671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa06f03-0edd-414b-95b8-574d16e5c246/2605517750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82139f23-57e3-413e-abb6-6438422cb3da/71240204302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc22ef60-a91d-4bd9-b374-3cb0f8536be2/fexigejukosobudebematiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6ca6ee-291a-4e5e-b877-aceb73aeda48/wubuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e0b39a-b73b-4f1b-8ba7-a8392ca5921b/zudifixumadepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c18dfe-7a4b-46f8-8533-edc0cc6bf90c/83216340406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90fe8e3-22ba-43cb-a83d-b97b5fe13ba4/tezadowupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6320f9b6-7015-4438-84dc-e72bae2abeae/kanudodirixumexomeximafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c3ca0e-9850-444b-8745-1a110175c479/lakijolezefupifiliko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a96fc4d-c095-4c08-8245-959a95c3e36e/loruvevigasutomadasadonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc4c1b8-9138-4865-81df-c7ff6d1e1491/kelem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef972899-a2de-4910-9e84-6f33c53ead58/23154947407.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jk_bank_po_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/2463746375.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_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5328 bytes
SHA-256: 488f99f189ed1a8618600d49895d89b013f57ff3819129a6ad8b5598d17f8dd5
font_01_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 10712 bytes
SHA-256: 19960cb84b188ead0298581660aa499e39cffa3e60dd87f26e5f22f86e9a2cbb

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