Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e5791272c2f29a…

MALICIOUS

PDF

42.1 KB Created: 2020-11-06 12:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 27bd198d74d613fa1ff9b64b97ca873a SHA-1: de97c4ccd79209508f63777773a59c9a4a7e1276 SHA-256: 64e5791272c2f29a3c52bf7f9ac089793acd43e8d7c2118bf1b2e6c18ba6c866
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?keyword=random+lyrics+generator PDF link annotation
    • https://xubesudovenij.weebly.com/uploads/1/3/4/5/134522980/lofafozevufirekex.pdfIn PDF document text
    • https://tudekazesabi.weebly.com/uploads/1/3/4/3/134367585/9395596.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/97aa9115.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/gedimuta/xunadevi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/49065980831.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/vinaraxuxupaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c88bce-da6b-4420-ac04-b4dc83ab99c2/zodivewuzutum.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/jenobulor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcee707-b63f-4c2c-80de-2b6a154a45f9/2008_mercedes_c300_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/59604516299.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/kdl-40r510c_reset_sony_bravia.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/padar.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/romance_da_raposa_aquilino_ribeiro.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/emirates_of_hacan.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_off00006524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5368 bytes
SHA-256: 3e48e39f1da091cb9895cb81d31bb3bc66995ef3e7c231d9278422c662da5143
font_01_sfnt_off00007761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7761 11128 bytes
SHA-256: 3554a90b47391d9972b2e2dc27d3d01e146867c4783a7707f52ecf0384c36d31