Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b0f1ff3fdbaa6f…

MALICIOUS

PDF

37.6 KB Created: 2020-03-13 07:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 583b6c0462f0a66457e71471ff9aaf22 SHA-1: 12ce647d62bd8ad42b6250cc26dd0dcdf184c5d3 SHA-256: 55b0f1ff3fdbaa6f6d42c85687bfcf62594c9ff92f84a7f1f4b6f30b57d69ba3
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO poisoning tactic. The primary URL http://x55fb.salon225.com/uploads/1/3/1/1/131164266/131164266.html#simple+present+interrogative+form+examples appears to be the entry point to this network. The heuristic PDF_SEO_LINK_FARM firing confirms the presence of a mass external PDF link farm. No scripts were extracted from this sample.

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://x55fb.salon225.com/uploads/1/3/1/1/131164266/131164266.html#simple+present+interrogative+form+examples
    • http://pawsitivelygroovy.net/uploads/1/3/0/3/130313157/zixuxideta-vuzejekem.pdf
    • http://www.cleanslatesp.com/uploads/1/3/0/4/130476978/3178740.pdf
    • http://annpiquette.com/uploads/1/3/0/7/130739254/viludemawi-lizevaxa-datubatabifatax.pdf
    • http://tipsytourssf.com/uploads/1/3/0/8/130813887/5405471.pdf
    • http://mickkok.com/uploads/1/3/0/8/130814749/wudowidulewetuxexe.pdf
    • http://cxmockup.com/uploads/1/3/0/2/130272905/c109d1249beb202.pdf
    • http://nmwordprocessing.com/uploads/1/3/0/7/130776257/mepafamotuni.pdf
    • http://cowabungaicecreamandcoffee.com/uploads/1/3/0/5/130590383/416124.pdf
    • http://traxessjapan.com/uploads/1/3/0/3/130379137/riwoxugafe.pdf
    • http://babylonlandscaping.com/uploads/1/3/0/2/130287960/zekawaxokovixolake.pdf
    • http://tuffnlitehockey.com/uploads/1/3/0/5/130551777/e4f4b862b0.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_off00006747.bin
541775ed6215260affa137b11a9a463b2d1fb17b0275455fe733ea6ae890aee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 8388 bytes

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