Malicious PDF — malware analysis report

Static analysis result for SHA-256 521e60f56e736fce…

MALICIOUS

PDF

56.7 KB Created: 2020-06-16 15:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0a6e174097ed0940f712c8da607ed9 SHA-1: 8c60c796b54f597deeec77f901ea4253e2e1732b SHA-256: 521e60f56e736fceef795a9e12b8f7aa3cf30a4b3c886380c362fe20d19b8a40
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of the immediate user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://aliciakallen.com/uploads/1/3/0/4/130489650/130489650.html#tutorial+template+wordpress
    • http://ketofastingqueen.com/uploads/1/3/0/5/130541688/45eb5c8b583.pdf
    • http://allincardhousesa.com/uploads/1/3/0/7/130739212/loseletigupat-mitiweb.pdf
    • http://usavirtualadmin.net/uploads/1/3/0/5/130547515/rujiguja.pdf
    • http://cardibloom.com/uploads/1/3/0/4/130483050/xuvugiru.pdf
    • http://mta-sts.mail.grovela.lt/uploads/1/3/0/4/130488312/gupogalobekoxak.pdf
    • http://5r65d7.bdgct.com/uploads/1/3/0/5/130590019/sebuxapupudexobix.pdf
    • http://mail.dianakayegeisen.com/uploads/1/3/0/5/130538994/buvugemanijupa_vuforodorudego_koget_jubimefo.pdf
    • http://miller-green.com/uploads/1/3/0/8/130874136/7e6bede9b8a4bd.pdf
    • http://brandonjacksonforthefourth.org/uploads/1/3/0/3/130379237/repenewofujumur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009301.bin
65366da8a2dd2d9f66d1a8705c6a954eb7e9baaae6368ec9b3093762c6d789f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 3568 bytes
font_01_sfnt_off00009fbf.bin
2e5ba77858e45e8546942f38e7847449f63556700c7fc76a99bf790ee30be5d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBF 4168 bytes
font_02_sfnt_off0000ad0f.bin
3c3a3b6cc6770bd2d379d49683704a7b55eef933bec22266f94ee248a92aec83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0F 12232 bytes

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