Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85a1f067cf18ffd…

MALICIOUS

PDF

45.1 KB Created: 2020-03-07 09:55:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bd5fd2aa921b6384a9aeea0fa05e927e SHA-1: 7d32038ef967235c086252c821ffabf7da90d16d SHA-256: f85a1f067cf18ffd24af79a5238339dce1c43be6744b5d2760d5ca8ef9c946f2
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be SEO poisoning or directing users to potentially malicious content hosted on these numerous external sites. No scripts were extracted from this sample.

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://8bpqx2.salon225.com/uploads/1/3/0/6/130604010/130604010.html#pcp+infection+wiki
    • http://www.626sparkboards.com/uploads/1/3/0/3/130379528/0d1760f9a26d8d1.pdf
    • http://www.crm.hamilkerrchallenge.com/uploads/1/3/0/2/130271229/1932841.pdf
    • http://truurelief.com/uploads/1/3/0/7/130740437/6a77fdde4ec6.pdf
    • http://cbdirect.biz/uploads/1/3/0/5/130588153/ae144048b26c5f.pdf
    • http://electrical-education-enterprises.com/uploads/1/3/0/7/130739640/walijevepomer.pdf
    • http://blumenbutt.com/uploads/1/3/0/6/130639876/4255126.pdf
    • http://diwangzhenqianyouxi.f18.ebkf.org/uploads/1/3/0/5/130550654/3e5f3a.pdf
    • http://sevenamericanbistro.com/uploads/1/3/0/6/130604996/1411430.pdf
    • http://nomadeen.com/uploads/1/3/0/6/130620929/tinat.pdf
    • http://babagoosh.com/uploads/1/3/0/7/130776271/7033220.pdf
    • http://www.montrealelite.ca/uploads/1/3/0/7/130740209/6f83d856.pdf
    • http://www.whitewayfinance.com/uploads/1/3/0/6/130604844/06cc1922a9.pdf
    • http://p4partyproductions.com/uploads/1/3/0/7/130775675/nutoxiwofuzuwuxo.pdf
    • http://hostmaster.watersurvivalbox.ch/uploads/1/3/0/7/130739099/529336.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_off000087a2.bin
63aa234ca77e4632453f8aad53037d98db49bc278dcaedfe5f44fbd69c47a85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A2 8372 bytes

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