Malicious PDF — malware analysis report

Static analysis result for SHA-256 b464a7e0ad0ceccc…

MALICIOUS

PDF

27.6 KB Created: 2020-05-30 21:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 49a71d849f2597a6f42c12e4000ef584 SHA-1: 0dc5c64963f8a6ccdf684aa00ba64dddce3cf7e6 SHA-256: b464a7e0ad0ceccc71c85b68098ba8a0af1319ff75651dd8b3262cd466859e6e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains a large number of external links to other PDF files hosted across various domains, indicative of a link farm or a distribution mechanism for further malicious content. The presence of the 'PDF_SEO_LINK_FARM' heuristic firing strongly supports this assessment. The document body contains garbled text and metadata related to PDF generation, but the primary malicious activity appears to be the redirection to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://7levelselling.stefanaarnio.com/uploads/1/3/0/6/130639257/130639257.html#obs+studio+android+apk PDF link annotation
    • http://dripinc.cash/uploads/1/3/0/6/130621800/7438356.pdfIn PDF document text
    • http://indistressco.shop/uploads/1/3/0/3/130324278/wisebiwigorel.pdfIn PDF document text
    • http://bgrahamfarrier.com/uploads/1/3/0/6/130620530/bf98e0885.pdfIn PDF document text
    • http://highdesertpaints.net/uploads/1/3/0/3/130312913/402cd5fc14.pdfIn PDF document text
    • http://gamebouchta.com/uploads/1/3/0/7/130775936/049e8d4aecae545.pdfIn PDF document text
    • http://74-123-72-117.mgwnet.com/uploads/1/3/1/4/131454436/793175.pdfIn PDF document text
    • http://carterwestbound.com/uploads/1/3/0/2/130271081/134254.pdfIn PDF document text
    • http://webersplumbing.net/uploads/1/3/0/4/130483445/jizisilu.pdfIn PDF document text
    • http://integratedself.net/uploads/1/3/0/3/130323789/4725914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 2

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_off000042f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42F1 9844 bytes
SHA-256: 7c215a053ee3ca66ca87f3a00ef6319fc8594366b90b438b31f4b1b48b42d062

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