Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88ca7cb2d617cf5…

MALICIOUS

PDF

45.3 KB Created: 2020-04-12 02:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 70ba70f8b9e746287b192e29ffbf0809 SHA-1: c971123a4563c6de0c2ca5000b1238bd95e3f862 SHA-256: d88ca7cb2d617cf5c7b824ae9694d12c49c7de10848a8aa9d612567ba31605ea
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, http://iweargreatness.com/uploads/1/3/0/5/130589384/130589384.html#nonsense+word+fluency+for+first+grade, is embedded directly in the document body. This suggests a tactic to drive traffic to potentially malicious websites or to manipulate search engine results. 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://iweargreatness.com/uploads/1/3/0/5/130589384/130589384.html#nonsense+word+fluency+for+first+grade
    • http://southlakehousepainting.net/uploads/1/3/0/7/130775475/8836896.pdf
    • http://britishdefencemilitia.com/uploads/1/3/0/8/130873918/12ab2a600c0c2a.pdf
    • http://crownjulesofhair.com/uploads/1/3/1/4/131438556/0f4a1705a44a689.pdf
    • http://paperchaseaccounting.com/uploads/1/3/1/3/131378897/moloda.pdf
    • http://alaskahistoryday.com/uploads/1/3/0/5/130542985/lupowagadaruniz-mozukom.pdf
    • http://muziekstudiogeldermalsen.nl/uploads/1/3/1/4/131407117/ruvor.pdf
    • http://extddivingcenter.com/uploads/1/3/0/3/130313169/752d32.pdf
    • http://heavenbphotos.com/uploads/1/3/0/4/130483355/4740801.pdf
    • http://banwyconstructionltd.org/uploads/1/3/0/5/130588773/ripakadufu.pdf
    • http://victor-chiu.com/uploads/1/3/0/5/130590719/kipidopi.pdf
    • http://mrsgillsfirstgrade.com/uploads/1/3/0/5/130545954/nawela.pdf
    • http://edoardobrotto.com/uploads/1/3/0/6/130621335/739e27c74.pdf
    • http://banwyconstructionltd.org/uploads/1/3/0/5/130588773/rip
    • 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_off0000724d.bin
3fe14dd6db397ec6a0d17d2276257e79b5daa8c212ce9680716c809ba9ce7970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724D 8332 bytes
font_01_sfnt_off00009267.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9267 16036 bytes

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