Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7abb0d0d63d2b8…

MALICIOUS

PDF

38.4 KB Created: 2020-06-04 06:43:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d3ecbb3498315347447c70ece61249 SHA-1: 4d3d366a50f3a1493814617d83e0df7f9312b47a SHA-256: aa7abb0d0d63d2b8e3461f9fb04e1dc6980decc57c328a2a41f5e770f31b1a94
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or distribute content. The document body, though heavily obfuscated, also contains several of these URLs. No scripts were extracted from this sample, and the primary malicious activity appears to be the distribution of these numerous external links.

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://hostmaster.growglobalgroup.com/uploads/1/3/0/8/130874672/130874672.html#dupes+for+sigma+brushes
    • http://strangenamedoc.com/uploads/1/3/1/6/131636832/bunuxiroroke.pdf
    • http://aniangallery.com/uploads/1/3/0/7/130776358/misidawupaj.pdf
    • http://rftstart.org/uploads/1/3/0/7/130775495/xobod.pdf
    • http://nycmiddleschoolbasketballleague.com/uploads/1/3/1/4/131437173/318cb.pdf
    • http://kmjlandscape.com/uploads/1/3/0/7/130738501/35f6c45962b5.pdf
    • http://mail.shortroots.com/uploads/1/3/0/6/130621805/7f5ffccde426f7.pdf
    • http://operationsongcolorado.org/uploads/1/3/1/4/131454394/sagavegavunibe.pdf
    • http://carbidecapitalpartners.com/uploads/1/3/0/5/130590298/xujixoditapog-fukupuvi-sezefevidowo.pdf
    • http://hostmaster.growglobalgroup.com/uploads/1/3/0/8/130874672/terms.html
    • http://hostmaster.growglobalgroup.com/uploads/1/3/0/8/130874672/dmca.html
    • http://hostmaster.growglobalgroup.com/uploads/1/3/0/8/130874672/policy.html
    • https://pezezej.files.wordpress.com/2020/06/31089897553.pdf
    • https://nanajubedod.files.wordpress.com/2020/06/bekuzirusana.pdf
    • https://subujitupus.files.wordpress.com/2020/06/kogofag.pdf
    • https://povitavalis.files.wordpress.com/2020/06/ditevelexixasixufivipajo.pdf
    • https://nunobum.files.wordpress.com/2020/06/femasejaderuranezoruwojo.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_off0000640f.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 1800 bytes
font_01_sfnt_off00006c9a.bin
60501f0b5b20797377b98bf4c07380c153612838161a84f417f1dfa2ef03b3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9A 9816 bytes

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