Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe432281c636c999…

MALICIOUS

PDF

49.9 KB Created: 2020-04-13 06:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9f67660525757f3ae26f1693d16719ec SHA-1: f2cf041889dc617b4a340cc557b2f2bbd97aef87 SHA-256: fe432281c636c9990e72fc61fe3134f93515dbd65c36955ded069e9e6ce047a9
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute malicious content. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. The ML classifier also strongly indicates maliciousness. The primary attack pattern involves directing users to a network of linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://mysunnation.com/uploads/1/3/1/0/131070371/131070371.html#que+es+bibliografia+en+word
    • http://arareity.org/uploads/1/3/0/8/130814714/0f382144cc.pdf
    • http://mikeflasterstein.net/uploads/1/3/1/0/131070861/nujagofimifibis_xupewiwuzu_xilidosatuz.pdf
    • http://atomicdog.shop/uploads/1/3/0/6/130605420/xawebidixu-fekosa.pdf
    • http://janewaggonerdeschner.com/uploads/1/3/0/5/130539109/zepogezuwa-xetotixeme.pdf
    • http://nadlan-haarris.com/uploads/1/3/1/3/131384016/6023554.pdf
    • http://llamaties.com/uploads/1/3/0/5/130588865/3b5b2662a43295.pdf
    • http://mx.aaronbartz.com/uploads/1/3/1/4/131452903/veposironekabafoxeg.pdf
    • http://mojofinancialservices.com/uploads/1/3/0/7/130740437/1002613.pdf
    • http://solidgroundpdx.org/uploads/1/3/0/7/130738754/7920175.pdf
    • http://gssidaho.com/uploads/1/3/0/8/130814856/roler_sepewikuvifu_rawan.pdf
    • http://zoeapos.com/uploads/1/3/0/3/130313698/fevituvovam-ludopupov.pdf
    • http://caffeinatedinspirations.com/uploads/1/3/1/4/131454482/vejapifaluvu.pdf
    • http://richmansburdenthefilm.com/uploads/1/3/0/5/130590122/tupanapeladipup.pdf
    • http://pinkypromiseonline.com/uploads/1/3/1/3/131397997/7da6de24b9.pdf
    • http://dulleslibrary.com/uploads/1/3/0/3/130323097/xizebedalumam.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_off00007a24.bin
f39bb71ce60c8e11df423817f203a393e6a52ef24cb829a669c2687154fcf58d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 9056 bytes
font_01_sfnt_off00009aea.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEA 2652 bytes
font_02_sfnt_off0000a451.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA451 16036 bytes

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