Malicious PDF — malware analysis report

Static analysis result for SHA-256 2971a6ec1460b322…

MALICIOUS

PDF

35.9 KB Created: 2020-04-24 01:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0eb710d3dcfc8c5594b1906e77f8762f SHA-1: aa69c92bb1095cab79bdda9dede3e1a75a8bf70c SHA-256: 2971a6ec1460b322f5fc2ce1c9a73a40661899672e9a4f09b465150cf40ad72b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF documents hosted on various domains, characteristic of a link farm for SEO spam or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded document body text, while heavily obfuscated, contains a URL that points to a page related to 'The Bird Box' movie, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://churchstrettontaxi.com/uploads/1/3/1/1/131163643/131163643.html#the+bird+box+imdb+parents+guide
    • http://chaparralrealestatellc.com/uploads/1/3/0/4/130477492/5368301.pdf
    • http://maryarkofthecovenant.com/uploads/1/3/1/3/131381259/f5f0ecc51.pdf
    • http://text-nology.com/uploads/1/3/1/4/131454556/bdb105.pdf
    • http://uvusouthwestseminar2019.com/uploads/1/3/0/9/130969526/3185995.pdf
    • http://curatidasolo.com/uploads/1/3/0/8/130873908/rugevasezize_givekapova.pdf
    • http://fangear.net/uploads/1/3/0/6/130621202/gopewevivugamo.pdf
    • http://liftedbyalissa.com/uploads/1/3/0/3/130313440/cccb5b14e20e.pdf
    • http://b4dallas.com/uploads/1/3/0/8/130814058/lexuzowugosofotiv.pdf
    • http://deepcoaching.solutions/uploads/1/3/0/8/130813869/lelijiwofodu-rosimidopabip-wetuwem-zusewiko.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_off00006226.bin
a6291edcb244a9466f973702a748c0ef1ea3c33ffdda5ff66db356729e28dc66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 8724 bytes

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