Malicious PDF — malware analysis report

Static analysis result for SHA-256 a458be4af65bb5f8…

MALICIOUS

PDF

33.1 KB Created: 2020-04-27 19:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: be804b4430c32f01ae138316db1eb699 SHA-1: 74e308aa0fc6f89f1533e3c929361c287911fa20 SHA-256: a458be4af65bb5f8644749a6a98735c6266798152d8fddcd8775490eeb26592f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which are numerically or generically named and hosted on similar domains, indicating a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. The primary intent appears to be directing users to a network of potentially malicious or deceptive websites, disguised as a color chart PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://maniglowco.com/uploads/1/3/0/3/130313167/130313167.html#berger+color+chart+pdf PDF link annotation
    • http://spiralup127.net/uploads/1/3/0/4/130436162/3af36dde5fada.pdfIn PDF document text
    • http://vinnyinspirations.com/uploads/1/3/0/7/130776886/c427e93.pdfIn PDF document text
    • http://iljconsulting.com/uploads/1/3/0/8/130814176/4768703.pdfIn PDF document text
    • http://onehillfarm.com/uploads/1/3/1/3/131384359/torinu-sewasojilejeta-xabolat-zibiwizujuw.pdfIn PDF document text
    • http://harrybick.com/uploads/1/3/0/2/130288533/lexusepobemove-xewulunojef.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000593c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 8376 bytes
SHA-256: a6af06cdd212e33c0076a78e4d3ee4292959645926b3d615086b6bd10b80e0d9

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