Malicious PDF — malware analysis report

Static analysis result for SHA-256 246611548f6882ec…

MALICIOUS

PDF

47.2 KB Created: 2020-03-24 04:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3ac090339acaa133748e493bb9a0a3e9 SHA-1: 1e49b7da8d4ed6eb54b36473aaec2ad26134889f SHA-256: 246611548f6882ec1509152813edcb8a18a5824026ba61371a1df7027ee323f5
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains text related to 'Ejercicios de polarizacion de transistores bipolares', which appears to be a lure to disguise the malicious nature of the embedded links. No scripts were extracted from this sample.

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://davidmarquesibanez.com/uploads/1/3/0/4/130477755/130477755.html#ejercicios+de+polarizacion+de+transistores+bipolares
    • http://shoprivercityapparel.com/uploads/1/3/1/0/131070521/7969069.pdf
    • http://blog.longshoresailingschool.com/uploads/1/3/0/6/130621250/1deeca9ddc.pdf
    • http://signgypsiesargyle.com/uploads/1/3/0/3/130323968/1286712.pdf
    • http://kimss.ca/uploads/1/3/0/3/130312974/8489186.pdf
    • http://carreraporlasaludnestle.com/uploads/1/3/0/6/130621458/zavegebafisu.pdf
    • http://74-123-79-127.mgwnet.com/uploads/1/3/0/6/130604013/12e655f54eab.pdf
    • http://661junkhauling.com/uploads/1/3/0/7/130776481/julutagul.pdf
    • http://permaid.net/uploads/1/3/0/6/130621708/bukoxas_rojetipelowik.pdf
    • http://hstefani.com/uploads/1/3/0/5/130551935/bdd3cc643a7.pdf
    • http://www.backroadcreations.com/uploads/1/3/0/5/130590525/kijiku.pdf
    • http://na.sb.payhoa.com/uploads/1/3/0/4/130488604/jadabefemalaj_vipavuxipek_nevosifa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dea.bin
11ca0395dd9672ef036151f7724e7fa090c29e9e30beef7e6a436ed60e2465d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEA 8824 bytes
font_01_sfnt_off00008e45.bin
e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 2884 bytes
font_02_sfnt_off00009816.bin
65ca2fa633a49bc637c245e3469a24bec82cbb291b9200d770c42ee2df1588ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9816 16096 bytes

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