Malicious PDF — malware analysis report

Static analysis result for SHA-256 14188b26f091fb16…

MALICIOUS

PDF

45.3 KB Created: 2020-06-12 05:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb53a183274d277a2925cad5ab6db36 SHA-1: 2bc229f746451ffde16532794f111ad7259628ea SHA-256: 14188b26f091fb16e4f9dc6cfa8c03a0c85aa9b5b478283542c3900d136f83e5
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains text related to 'teachings on love' and the authoring application 'wkhtmltopdf', which is often used to generate PDFs from web content. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to drive traffic to malicious sites.

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 http://ttthardstyle.com/uploads/1/3/0/7/130740011/130740011.html#teachings+on+love+pdf
    • http://cpanel.ldavismunro.com/uploads/1/3/1/3/131384017/2900851.pdf
    • http://debbythepearlgirl.com/uploads/1/3/0/2/130272432/8e24beb506c44c8.pdf
    • http://blisscious.com/uploads/1/3/0/8/130874073/rewevokovokuwol-nomipelazi.pdf
    • http://50embraceit.com/uploads/1/3/0/5/130590321/72bfda1edb4.pdf
    • http://nicolepatonschofield.com/uploads/1/3/1/3/131380505/kejojugurop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zaxezat.files.wordpress.com/2020/06/52834649396.pdf
    • https://disumagovuza.files.wordpress.com/2020/06/wixepemab.pdf
    • https://gifamadez.files.wordpress.com/2020/06/wumebelawi.pdf
    • https://pobadax.files.wordpress.com/2020/06/52673233743.pdf
    • https://luwaliwev220981188.files.wordpress.com/2020/06/zakosufo.pdf
    • https://malikosefafi340524417.files.wordpress.com/2020/06/gixudavadebopupi.pdf
    • https://negowonot.files.wordpress.com/2020/06/56595999591.pdf
    • https://zegikoduna.files.wordpress.com/2020/06/lukajegaw.pdf
    • https://jizogozup.files.wordpress.com/2020/06/donepozikusegidekalodem.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000087e1.bin
f3aa16cf6492e8182eafd2514dc33615665ceec6bda5c3b2f2fe3b287e08c779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E1 9908 bytes

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