Malicious PDF — malware analysis report

Static analysis result for SHA-256 d743297c199f3ad2…

MALICIOUS

PDF

62.0 KB Created: 2020-04-21 23:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2021-06-30
MD5: d41c46853a6764ab17cb7477857ef4b0 SHA-1: fe2a3e797f861e4e8fc0505d4809ad20a1f0e373 SHA-256: d743297c199f3ad203fadcde2723ac10966e9540a54bc46bd41833b55ee21b66
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents. The document body, though heavily obfuscated, contains text related to 'Vaccination chart india pdf' and the wkhtmltopdf application, suggesting a lure to trick users into visiting malicious or SEO-spam sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

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://uavoftexas.net/uploads/1/3/0/8/130874645/130874645.html#vaccination+chart+india+pdf PDF link annotation
    • http://boreleyedoctors.org/uploads/1/3/0/2/130291874/7893776.pdfIn PDF document text
    • http://marriedtofilm.com/uploads/1/3/1/4/131437623/zapegetawixo_fuxafiju_xoxowamepukona.pdfIn PDF document text
    • http://spaceagemusic.ca/uploads/1/3/1/4/131453527/japolalividubobezeri.pdfIn PDF document text
    • http://electricianlivingston.org/uploads/1/3/0/6/130620694/9185401.pdfIn PDF document text
    • http://aviladialsdesigns.com/uploads/1/3/1/3/131380094/tibopuwozagag-devinerivilazub.pdfIn PDF document text
    • http://pecannuts.net/uploads/1/3/0/6/130621732/8781845.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 9448 bytes
SHA-256: 197e0899282ad7476333078cc171ccf45c2b60f901f3fc90d3ac39da9bbaa3db

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