Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c028c695b4ffcb…

MALICIOUS

PDF

37.3 KB Created: 2020-03-30 12:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a77a909ea401a225c264dd6104e7ac99 SHA-1: 3006ccaf17a5a7dc673522f047585f8ecdbef9c8 SHA-256: 95c028c695b4ffcb8a7de428eab1757f5270f11522f46aeef9132c27a9e2f732
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 of which point to other PDF files hosted on similar domains. This behavior is characteristic of SEO spam or a link farm designed to distribute malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of numerous external links is the primary indicator of malicious intent.

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://zenwich.co/uploads/1/3/1/4/131437728/131437728.html#the+bad+beginning+full+movie
    • http://singporehealthtalks.net/uploads/1/3/0/8/130814902/d1cb9a2a94f60e8.pdf
    • http://vivalatinotv.com/uploads/1/3/0/6/130620919/3038565.pdf
    • http://demifeatherston.com/uploads/1/3/0/7/130738882/f5c79be8e.pdf
    • http://villatale.cn/uploads/1/3/1/3/131398212/1703186.pdf
    • http://wiesnkirtag.at/uploads/1/3/0/5/130551210/d113777de4.pdf
    • http://gemyoga.org/uploads/1/3/0/4/130435574/4978321.pdf
    • http://leasemyrv.com/uploads/1/3/0/6/130640088/1762545.pdf
    • http://coffeeandrustjournals.com/uploads/1/3/0/2/130289355/kekuzof_mevitameposedes_detixunavevo.pdf
    • http://snakesnroses.com/uploads/1/3/0/6/130604605/1764631.pdf
    • http://pierporthotel.com/uploads/1/3/0/5/130589297/borakagi.pdf
    • http://miguelchanonafotografo.com/uploads/1/3/0/6/130620709/merugofiramesu.pdf
    • http://whitneymlundy.com/uploads/1/3/0/6/130620684/1988390.pdf
    • http://fillgauge.net/uploads/1/3/0/8/130814411/lisobigazoda-piken.pdf
    • http://vacationhomesresorts.com/uploads/1/3/0/5/130590163/044646549c249.pdf
    • http://anywarefx.com/uploads/1/3/0/5/130589214/845039.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_off00006887.bin
b4f556120b044f261f7a0136ef54e5101853b937574f3fa4b48e9ed219d5bf97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 8544 bytes

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