Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37a26c3dce63701…

MALICIOUS

PDF

34.4 KB Created: 2020-05-26 04:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0569055a7a8e373c4bcc19d253cb127c SHA-1: 205598f05938ab66ff44a3eef6a2f232a85ee92b SHA-256: a37a26c3dce63701d1c365a940d4fca3ee96222a504c091efd5f3410413c4766
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to these external resources, which likely host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://2l9.undesirable.us/uploads/1/3/0/5/130590687/130590687.html#towles+new+tech
    • http://foxholediesel.com/uploads/1/3/0/4/130477003/852a9.pdf
    • http://jppaintingcolorado.com/uploads/1/3/0/5/130550772/9434392.pdf
    • http://ippseurope.org/uploads/1/3/0/6/130621060/13124d189b45.pdf
    • http://publicrelationsconsultant.net/uploads/1/3/0/2/130272363/nodaxod_nisej_warikorigutu.pdf
    • http://vicaraously.com/uploads/1/3/1/1/131164202/6021649.pdf
    • http://wildfantasycat.com/uploads/1/3/1/8/131856034/geligereponewujidoz.pdf
    • http://randrsportsmassage.com/uploads/1/3/0/5/130590126/zivozebidumunezud.pdf
    • http://ghrmarineservices.com/uploads/1/3/1/4/131453453/5215338.pdf
    • http://defunkedband.com/uploads/1/3/0/2/130289380/tuvosidabilipumesi.pdf
    • http://matthewspressurewashing.net/uploads/1/3/0/7/130739185/4980624.pdf
    • http://euclataws.com/uploads/1/3/0/4/130488217/pemifub-ruloz.pdf
    • http://jamieflejouphotography.com/uploads/1/3/0/4/130478110/viser.pdf
    • http://d365digitalservices.com/uploads/1/3/0/6/130605374/6ea60764.pdf
    • http://nwpropertysolutions.org/uploads/1/3/0/5/130543816/3542089.pdf
    • http://aurorivallentin.com/uploads/1/3/1/3/131380343/8801055.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_off00005bb1.bin
667f11f629d042fa847a48dd6b56c9c96e6c820d1f17139614c3d1e30b3c3ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB1 10240 bytes

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