Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b571ec7361ee1f1…

MALICIOUS

PDF

37.4 KB Created: 2020-06-08 16:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4fa1edadef355b1c917c250003a82a SHA-1: 456cbc1bf8b9abbfc155e24280f8c13cc829aef9 SHA-256: 1b571ec7361ee1f1e6ec98ac314b44f9b395fd7b475087e8fbeb790955a63956
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various PDF files hosted on different domains, suggesting a link farm or SEO spam campaign. The document body contains garbled text and the authoring application information, but the primary malicious intent appears to be directing users to the 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://sycinvestments.net/uploads/1/3/0/6/130604657/130604657.html#resta+de+fracion%25C3%25A1rios+pr%25C3%25B3prios+e
    • http://sdwelders.com/uploads/1/3/0/7/130738758/makabugi_pezuziwovujuw_jigewovuz_vajovalepotodat.pdf
    • http://austin1991.com/uploads/1/3/0/6/130620990/1283229.pdf
    • http://hostmaster.i-do-films.co.uk/uploads/1/3/1/8/131856149/pimiramu_vevolepoki_rewuz_sidoranefu.pdf
    • http://webmail.allwoodsbutchers.com/uploads/1/3/0/6/130621084/metalomexosemu_pazebof_sokatafoxipis_wosafa.pdf
    • http://mta-sts.jenpenasphotography.com/uploads/1/3/0/7/130738803/dudezesupulutofuko.pdf
    • http://mail.tradwave.eu/uploads/1/3/0/3/130323180/4972649.pdf
    • http://dakotaprairiek12nd.org/uploads/1/3/1/4/131437967/1031346.pdf
    • http://host214.carmichaelnl.com/uploads/1/3/0/6/130605490/fozifag_sijotubu_zezipubaferad.pdf
    • http://uwoshkoshcanvasonline.org/uploads/1/3/1/0/131071312/dulare-dosoz.pdf
    • http://webdisk.stuarts2gabon.com/uploads/1/3/0/4/130476485/nipatuw.pdf
    • http://en2.gavaresse.fr/uploads/1/3/1/3/131380273/tanoredilozu-zagile.pdf
    • http://orshaw.com/uploads/1/3/0/7/130776553/51b4b88f8c3.pdf
    • https://gezawutiz.files.wordpress.com/2020/06/91372914164.pdf
    • https://xafexuwosuvi.files.wordpress.com/2020/06/36689252956.pdf
    • https://kugigoke149047822.files.wordpress.com/2020/06/jupubaxerolidekobev.pdf
    • https://pusivogaj.files.wordpress.com/2020/06/17802886702.pdf
    • https://wutuximi750560644.files.wordpress.com/2020/06/zuralosevabax.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640e.bin
cde8ba3edaaca97f645b8d4203c8dae9dde3448833325f00142eb03cf73259dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 10944 bytes

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