Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8bdf137664bb34…

MALICIOUS

PDF

49.1 KB Created: 2020-06-06 02:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f779b9b50eb331e950ab41155686de5 SHA-1: 7ec390e9ebabdad4ad815810bf2c57edc8601d0a SHA-256: 2a8bdf137664bb3462772c1b058723e0589a5a065d391460da4ffc23443c0697
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. One of the embedded links, 'http://gyrtn.bpmtc.com/uploads/1/3/0/7/130775685/130775685.html#mp3+birle%25C5%259Ftirme+program%25C4%25B1+indir+gezginler', suggests a lure for downloading MP3 software. The heuristic 'PDF_SEO_LINK_FARM' indicates a technique to generate traffic or distribute content through a network of linked PDFs. 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://gyrtn.bpmtc.com/uploads/1/3/0/7/130775685/130775685.html#mp3+birle%25C5%259Ftirme+program%25C4%25B1+indir+gezginler
    • http://hostmaster.swlondonrenovations.co.uk/uploads/1/3/0/5/130551086/dikeluvufo.pdf
    • http://emmachristopherlakesassociation.org/uploads/1/3/0/2/130272940/2219734.pdf
    • http://dimension-net.net/uploads/1/3/1/4/131436983/gofax-mukagarepilube-keperib-zokiwup.pdf
    • http://mywisemoney.net/uploads/1/3/0/4/130436313/8d94087558e.pdf
    • http://autodiscover.rbpaintcompany.com/uploads/1/3/1/3/131380205/kixavit.pdf
    • http://pagosakayakrentals.com/uploads/1/3/0/3/130313524/jutodi.pdf
    • http://gyrtn.bpmtc.com/uploads/1/3/0/7/130775685/terms.html
    • http://gyrtn.bpmtc.com/uploads/1/3/0/7/130775685/dmca.html
    • http://gyrtn.bpmtc.com/uploads/1/3/0/7/130775685/policy.html
    • https://tomejaz.files.wordpress.com/2020/06/18113198864.pdf
    • https://pikirumabe.files.wordpress.com/2020/06/zegasojewefofofufekuv.pdf
    • https://zozumak.files.wordpress.com/2020/06/89364293540.pdf
    • https://sezagadi.files.wordpress.com/2020/06/tidakoju.pdf
    • https://vikijoxedip.files.wordpress.com/2020/06/16277297580.pdf
    • https://juguxog386085692.files.wordpress.com/2020/06/wuxobunifakege.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a15.bin
fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 6588 bytes
font_01_sfnt_off00006a83.bin
d087c77bd37db199d2ba3f3d4bbe0ecf5553f3a120c395f7280997d911ad18dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 3092 bytes
font_02_sfnt_off00007764.bin
6568a97411fd828df2f8e3a0f9bedb5c0e700f2b7ec1031b826a05a3ba02d8bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 12688 bytes
font_03_sfnt_off00009ef1.bin
17683c212d38ed0b001e01407b1db7150c7f0ac11484a74e1d06e51444ce6a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF1 16492 bytes

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