Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4693c876c71c723…

MALICIOUS

PDF

45.1 KB Created: 2020-06-02 15:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06192ba2eb204958c0ff529af08a021a SHA-1: a13eba78cd1ca2759c5e456e0b4544d260b1e1b5 SHA-256: b4693c876c71c723b88199a971e2a6926d81de65fdf30b97908cc5de075c42c3
92 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded external URLs. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, suggesting a malicious intent to redirect users. The document body contains fragmented text and URLs, reinforcing the idea that the primary function is to host and distribute these links. No scripts were extracted from this sample, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 3

  • 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
  • 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://hearthealthpsa.com/uploads/1/3/0/6/130604984/130604984.html#a+to+z+bollywood+mp3+songs+320kbps+z
    • http://shaneantisdel.com/uploads/1/3/0/7/130739982/34a425ee52ab2f.pdf
    • http://cenicenterprises.com/uploads/1/3/1/4/131437508/30a23c970.pdf
    • http://wwcreationsbysher.com/uploads/1/3/1/4/131437576/kadaro-ruluxudon-wijorajetoji.pdf
    • http://hearthealthpsa.com/uploads/1/3/0/6/130604984/terms.html
    • http://hearthealthpsa.com/uploads/1/3/0/6/130604984/dmca.html
    • http://hearthealthpsa.com/uploads/1/3/0/6/130604984/policy.html
    • https://nitapid.files.wordpress.com/2020/05/xuvemodijizowizikijaga.pdf
    • https://xisirizu.files.wordpress.com/2020/05/madokiki.pdf
    • https://fapunakaruko.files.wordpress.com/2020/05/13596617459.pdf
    • https://badiwilam.files.wordpress.com/2020/05/gakawi.pdf
    • https://vemupuki.files.wordpress.com/2020/05/29997082596.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000487d.bin
dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x487D 2656 bytes
font_01_sfnt_off00005379.bin
1b68eb0745f369bd9f805b89718582bd6ebaf917deeaaae5095027b3f32dc7b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5379 3048 bytes
font_02_sfnt_off00005f87.bin
d07a9fdf75b1e191e7a1ea25e2941b9f689ff98e7e435169aef8b5fb7be41b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 2604 bytes
font_03_sfnt_off00006a9d.bin
806d12f4c18e044784d20764d58024893796e88f204c306662924b3e907cbcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 2108 bytes
font_04_sfnt_off00007473.bin
168ae3642f0bdc8962b9780413602501bc6b6040d6b6f02f07d5bd85aa2965be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 10008 bytes
font_05_sfnt_off00009703.bin
c5e61597ca323f5981c3428dbe91e9fe326b58799e3ed96e0c9878f6a12724e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9703 4624 bytes

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