Malicious PDF — malware analysis report

Static analysis result for SHA-256 831cdc8ea5865877…

MALICIOUS

PDF

49.8 KB Created: 2020-04-04 07:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 691b3b96106d23afb5608209247f0292 SHA-1: 24bae6ec616bce2f7239d1f00e51b2b1a85994c1 SHA-256: 831cdc8ea586587779871e9c2c524ed0ad5e2ebd6c4a4a0db0d7d32b274b418d
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, a technique often used for SEO spam or to distribute further malicious content. The document body is heavily obfuscated but contains references to URLs that are also present in the heuristic findings. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://letsdanceteamnyc.com/uploads/1/3/0/4/130475938/130475938.html#hoja+de+respuestas+test+crea
    • http://loveinlighthealing.com/uploads/1/3/0/8/130813055/fumosaxepuki.pdf
    • http://thesailingbroker.com/uploads/1/3/0/7/130776672/22580f17e505f.pdf
    • http://thebridgeconsulting.net/uploads/1/3/0/5/130546606/994716.pdf
    • http://moneytreerentacar.com/uploads/1/3/0/2/130271190/c56b529c.pdf
    • http://rmsinternational.ca/uploads/1/3/0/6/130640057/lapuz.pdf
    • http://yamureconsulting.com/uploads/1/3/0/6/130604699/298df73.pdf
    • http://spotlesspropertymgt.com/uploads/1/3/0/2/130270882/sebuwagedopineripil.pdf
    • http://ellenlongmcgrawhill.com/uploads/1/3/0/6/130639926/xozabojusebuk.pdf
    • http://debrios.com/uploads/1/3/1/4/131453396/nuganulem-ralixutoxodugo-bonabizexegeje-lakidenoxig.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_off00007158.bin
5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 6728 bytes
font_01_sfnt_off000081fb.bin
154ac7f25e835f755872385d9da630d1fc29a189cfb4408acace7f8c4fd84abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FB 9248 bytes
font_02_sfnt_off0000a319.bin
9955a10f44b3bbd8f8c69af80e2423d9288745809d8e230d8c4621fdf1b04c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA319 16096 bytes

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