Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5197e889be5feed…

MALICIOUS

PDF

39.6 KB Created: 2020-05-14 03:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a25476be1e3529167cc942dec4be8760 SHA-1: 6229544a4fb58dea544d19b68e6c783eb23e94ac SHA-256: d5197e889be5feed89285aceb8a80de93a325f263ff51001b8d4530e304566a5
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://scrubs4work.com/uploads/1/3/0/5/130545043/130545043.html#artillerists+apk+mod
    • http://kristiepottertherapy.com/uploads/1/3/0/8/130814101/5490847.pdf
    • http://andreajohnsony.com/uploads/1/3/1/4/131437742/2114285.pdf
    • http://rainbowsnoaz.com/uploads/1/3/1/3/131378814/kusazig.pdf
    • http://gaaconsultants.com/uploads/1/3/1/3/131380720/9139620.pdf
    • http://imrosiepatey.com/uploads/1/3/0/7/130738740/nanalidopajofo_damujomudi_fiwonexazekuvu.pdf
    • http://mswilliamsonline.com/uploads/1/3/0/7/130776037/limululol-timorolefam-wamewebevebuje.pdf
    • http://livingwaterschristianlp.com/uploads/1/3/0/6/130621588/3207847.pdf
    • http://npcmutantmuscle.com/uploads/1/3/0/6/130621802/ef712364c4f4d6f.pdf
    • http://whatthehenna.com/uploads/1/3/1/3/131398515/8877583.pdf
    • http://michelleboler.com/uploads/1/3/0/6/130604518/3570309.pdf
    • http://myservicescompany.com/uploads/1/3/1/0/131070030/3483592.pdf
    • http://iamdegoat.com/uploads/1/3/1/4/131438062/2148168.pdf
    • http://hellookb.com/uploads/1/3/0/8/130874501/vefimaruxopotir.pdf
    • http://bowmanfieldaviationheritagefestival.com/uploads/1/3/0/7/130739007/gepun-turumofowiv-mamesu-lumamapoxu.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_off00005aa3.bin
097ef255c5952f3567ed9fd7a40c0d902efcbe0869b071b9f9c7ebdcd6e2a990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA3 10256 bytes
font_01_sfnt_off00007e0a.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 16092 bytes

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