Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8bd8ce8540aa96…

MALICIOUS

PDF

44.7 KB Created: 2020-11-02 22:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 757ca0384f8fa703112d0b42d45e1ca3 SHA-1: dbde145acbe00d9ac95a0561de295f23ebafa0ee SHA-256: ac8bd8ce8540aa96d1df3d5a4e22f7544d65ccac0f08a082577a07c42ff46071
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://gettraff.ru/aws?keyword=top+antivirus+app+for+android+2018 In PDF document text
    • https://vomefamatufovo.weebly.com/uploads/1/3/4/3/134378522/18328.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/fukavatajosaxa.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/7976038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d647a5f8-6cff-4082-80c6-beb46f7e7252/50115510016.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/into_the_wild_summary_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/gameboy_cpu_opcodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/zenusew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6848/9881/files/64211981291.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/66228163031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/70030445508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9126/8262/files/try_japanese_language_proficiency_test_n3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6558a12c-7c9d-47af-b68e-586eb2b9eeef/18657401452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 5296 bytes
SHA-256: 4fa9bd253f569ea63a45d6fe50306711a51d359bff97251159ad3244c59e8f5c
font_01_sfnt_off0000730e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 10856 bytes
SHA-256: 4d4b48c201e693bfe01d6e51a9ff76856ea6bb832dbb324a4477637e53c24d95
font_02_sfnt_off000097e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2