Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61fe16e2999363f…

MALICIOUS

PDF

31.7 KB Created: 2020-04-17 03:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: afd81c7ec3ae817caa4868354f4ee887 SHA-1: fa89992c2182f46cca195f840b3b9d2a89650b1c SHA-256: e61fe16e2999363fdc0e643d7cc3ad1d7dd6a687c501f792155fdda9a7914f6a
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external links suggests a redirection-based attack. The document body contains what appears to be junk data and a few URLs, reinforcing the link farm hypothesis.

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://mcdowellengineering1.net/uploads/1/3/1/3/131379729/131379729.html#baahubali+film+songs++masstamilan
    • http://austinengravingandsublimation.com/uploads/1/3/0/7/130775904/bfa4ced0.pdf
    • http://nanashippieshackdenton.com/uploads/1/3/1/4/131438044/kepav-tixevifilusu.pdf
    • http://hostmaster.neilbottle.co.uk/uploads/1/3/0/5/130589230/6395114.pdf
    • http://accentusdirectllc.com/uploads/1/3/1/4/131437552/sipakijogum-suzexisagirezix.pdf
    • http://willemwijs.nl/uploads/1/3/0/6/130620763/ponadezaxukimax.pdf
    • http://hopehealthacademy.org/uploads/1/3/1/3/131383541/8918202.pdf
    • http://white-cake.com/uploads/1/3/1/6/131606955/8796042.pdf
    • http://brandonkim.co/uploads/1/3/0/6/130621510/zikabepogo_pivigowilin.pdf
    • http://kokuasupport.org/uploads/1/3/1/6/131606866/add0ab6f270.pdf
    • http://dalelashsholisticsangha.com/uploads/1/3/0/6/130621603/kenigewaponasax.pdf
    • http://corchomora.com/uploads/1/3/0/7/130740437/nupaf_wotekasenifefid.pdf
    • http://stylebunnie.com/uploads/1/3/0/3/130323674/4330066.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b8d.bin
baabff4df85084aacfb770d469f6696a6ffa5e5df291e01b35806e1c558c7d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8D 6804 bytes
font_01_sfnt_off000066cd.bin
9eb636cd4935c244d710877cd27f5863e7475c0c7afe2e0e81477ef8bb920394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CD 2816 bytes

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