Malicious PDF — malware analysis report

Static analysis result for SHA-256 d329e7904f436cb4…

MALICIOUS

PDF

42.2 KB Created: 2020-04-04 12:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a120f73816b6709722711dc1018c6e4d SHA-1: 14806e75329b5b2e9acfe848b58d853a3095532d SHA-256: d329e7904f436cb4cd27132fe13f05c730521cfcb665576db96084bf07f2d527
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, many pointing to PDF files on various domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of SEO-optimized PDF documents, likely for further malicious redirection or content delivery.

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://paintingthebooze.com/uploads/1/3/0/5/130543979/130543979.html#electroqu%C3%ADmica+%28celdas+electrol%C3%ADticas+y+celdas+voltaicas+o+galv%C3%A1nicas%29
    • http://mirroredgecleaning.com/uploads/1/3/0/2/130270900/lobidesuvozikujegaj.pdf
    • http://udomyte-corporation.com/uploads/1/3/0/6/130639461/57806.pdf
    • http://alefrawedding.com/uploads/1/3/0/7/130775056/siguduxopebo.pdf
    • http://jenzimongthuong.com/uploads/1/3/0/2/130289344/piwigegufuturebo.pdf
    • http://margiesfriedchicken.com/uploads/1/3/0/5/130588769/c2141a6.pdf
    • http://drjoeberg.com/uploads/1/3/1/3/131383737/tasuzufib.pdf
    • http://weplantheparty.org/uploads/1/3/0/2/130288462/3a791b70.pdf
    • http://belle-ameboutique.com/uploads/1/3/0/6/130639652/boxaroxisetofanelo.pdf
    • http://lighthouseservices.biz/uploads/1/3/0/2/130287989/mikedubiw_gikofan.pdf
    • http://jperealty.com/uploads/1/3/1/4/131438180/8032b.pdf
    • http://crazyandcraftymom.com/uploads/1/3/0/8/130874086/2306936.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_off00006d16.bin
03518461b7e7d124549e2feeb4a8b5c48debf16979092fffb431c4ad3d36a3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 9280 bytes
font_01_sfnt_off00008e5c.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 2652 bytes

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