Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb93477042e7c8b…

MALICIOUS

PDF

42.3 KB Created: 2020-04-12 10:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 04e38cd0a136d01d050e146b7704cbe0 SHA-1: e0149a1986a70de7e6b4f5ceb36b0bf24668959a SHA-256: 8bb93477042e7c8b176770a4eb77c71d6cfaa0cae51cdb853a8e2bb53399e9d7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

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://greenleepropertiesltd.com/uploads/1/3/1/4/131437331/131437331.html#carbs+in+subway+italian+bmt+salad
    • http://g-square-sg.org/uploads/1/3/0/4/130476346/6519152.pdf
    • http://prenatalyogatoronto.com/uploads/1/3/0/7/130739475/1897da63.pdf
    • http://cruisefiordland.org/uploads/1/3/0/7/130776500/3675381.pdf
    • http://marcmarenco.com/uploads/1/3/0/7/130775990/rezisebemi.pdf
    • http://jammlawncare.com/uploads/1/3/0/5/130550683/ravazosevap_muwefurebenes_tazile.pdf
    • http://verdelimon.org/uploads/1/3/0/6/130621094/4202061.pdf
    • http://pinkcloversoapco.com/uploads/1/3/1/4/131454560/4927698.pdf
    • http://billaclaim.com/uploads/1/3/0/8/130874067/fitomumefidit.pdf
    • http://bangopop.com/uploads/1/3/0/4/130436127/c5ed570d7.pdf
    • http://alpsvirtual.org/uploads/1/3/1/4/131437181/6339394.pdf
    • http://plantfoodhigh.com/uploads/1/3/1/1/131164128/fesosa_wolodexogo_bapedodake.pdf
    • http://courtesyrealtygroup.net/uploads/1/3/1/4/131438228/be9ee9bb5b2b2f.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_off00007a5d.bin
b5f779f7fde807fcde48939e6b6eabc3ef443018e9fc80f1161c474c19ae77f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 9132 bytes

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