Malicious PDF — malware analysis report

Static analysis result for SHA-256 c766f9239047d513…

MALICIOUS

PDF

46.2 KB Created: 2020-07-14 04:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1d13b0823bb4bc8a3293c17a6bed49 SHA-1: 107a8da0b2250e1cb0064a06c570e8e02dc99170 SHA-256: c766f9239047d51392ce2dcfb044faf25160661e3c89235166bafd87cf8c7c76
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a malicious redirector. This redirector is linked to a keyword search for 'panera menu pdf summer 2019', suggesting a lure to trick users into clicking. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.ru/wb?keyword=panera%20menu%20pdf%20summer%202019
    • http://files.sharadslunchbox.com/uploads/1/3/1/8/131871643/5498373.pdf
    • http://files.khepe-ra.com/uploads/1/3/1/3/131381480/vigupepof_wutosabifexerez.pdf
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdf
    • http://files.sharonstephenson.co.nz/uploads/1/3/1/0/131070035/7785624.pdf
    • https://ladobetoror.files.wo
    • https://polulexugiz.files.wordpress.com/2020/06/66395501884.pdf
    • https://vajokipoz.files.wordpress.com/2020/07/59287710365.pdf
    • https://turojiv.files.wordpress.com/2020/06/fejaxatadafuraz.pdf
    • https://ladobetoror.files.wordpress.com/2020/07/fagagobed.pdf
    • https://xonegedetetu.files.wordpress.com/2020/07/22989155294.pdf
    • https://xopaluwefaje.files.wordpress.com/2020/06/rakeladuxuwafasu.pdf
    • https://jagurejus.files.wordpress.com/2020/07/rubanexus.pdf
    • https://witujaji.files.wordpress.com/2020/06/43446498911.pdf
    • https://jekiwex.files.wordpress.com/2020/07/11525456718.pdf
    • https://cdn.shopify.com/s/files/1/0432/2476/0488/files/xidovita.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/75596714460.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/mifis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/zoxaresavogex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/xavuvurevopexari.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/kisibavoxulilebaxup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007725.bin
76d8513fcc795d9e7b511d245ab614e21dc1d9de89be19e92df4de4dc9c5811c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7725 5280 bytes
font_01_sfnt_off000088ea.bin
4a9a7b715fc6f2ba6f2f779b3847cb2bb159509844d113209a6050b81040de5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EA 10104 bytes

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