Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5204425af2608e4…

MALICIOUS

PDF

40.8 KB Created: 2020-11-06 01:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a94d73aca12a8313330b8dd3fbf5dd8c SHA-1: bd4b0190a1e8212570701e753909150bb32dfa41 SHA-256: d5204425af2608e413132034e3e5afe7d9bbe3794d70f8a420b90bc3e19a157b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=nintendo+drastic+ds+emulator+apk+download In PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/kuninog_vojosuzususiwi_dubinapuxava.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/pedesowodutupupido.pdfIn PDF document text
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/dutafedikeporibomow.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/simefaruw.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/wazatekeximaxu-jexusakakelar-tobul.pdfIn PDF document text
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/6bcf2bf7fa63a.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/e2f3b.pdfIn PDF document text
    • https://jikesekija.weebly.com/uploads/1/3/4/3/134367489/rixupozuxezifom-raberigegoroza-namidefidu-gugoke.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/nilafafakem/38762362244.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/tuwogipegemike.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/marriage_biodata_format_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/medelexozedefekevebuwe.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_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 5344 bytes
SHA-256: 9c46d0f3985fafaff3c2667008227b95a7eb707818bd7cbc6487593115879319
font_01_sfnt_off000074df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 9732 bytes
SHA-256: cb67cfb55c549fb6e13c65845371da4a361f65d846369f3241995dd9aa211a6f

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