Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc14db6cb3c9304…

MALICIOUS

PDF

40.3 KB Created: 2020-04-07 03:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 66f6530b792c17060a38bc4b32c7395c SHA-1: e8267cba9ec5547777167abab46d8442735fc503 SHA-256: 7dc14db6cb3c93044ccff30b90963605a9dbf41809265f021928e80d7f88ad3c
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to these URLs, suggesting a link farm or redirection scheme. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent, likely to direct users to malicious content or phishing sites. No scripts were extracted, but the extensive linking pattern is characteristic of SEO poisoning or traffic redirection attacks.

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://pvgconsulting.com/uploads/1/3/1/4/131482808/131482808.html#himno+a+quintana+roo+letra+corto
    • http://beautyinthejourney.net/uploads/1/3/0/6/130622029/4639372.pdf
    • http://coralreefadventures.org/uploads/1/3/0/7/130776085/sizeruron_nawifigaweli_wofijuwalota_xoranizigevez.pdf
    • http://achintconsultinginc.com/uploads/1/3/0/5/130588164/timiduwaliro-belevuf-nixafomedo-kafijulazunofak.pdf
    • http://straightkeyconsulting.com/uploads/1/3/0/6/130604973/3ac9e5f987b.pdf
    • http://oklahomacitybulldogclub.org/uploads/1/3/0/3/130323342/maxevadosodatiweri.pdf
    • http://forty4apps.com/uploads/1/3/0/4/130488338/33f390d4ea.pdf
    • http://carsonsphotos.com/uploads/1/3/1/4/131452818/zopuxesimijo.pdf
    • http://matematicaslupitarodriguez.com/uploads/1/3/0/7/130738524/nuzemavikula.pdf
    • http://danidepaula.com/uploads/1/3/0/9/130969775/fda27.pdf
    • http://pipa-star.com/uploads/1/3/0/7/130738998/fivab.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007379.bin
42197fa55fc1d16bc98598484a090bfb3d694054aa4723298b14d42ea37d78a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 8572 bytes

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