Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b34a7f762d414d2…

MALICIOUS

PDF

40.6 KB Created: 2020-04-04 14:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bc1337ed3dec9cdb09fb54712ec42045 SHA-1: 1aea4a53d8891e6e72ddde0541e8b4cf1e256a86 SHA-256: 4b34a7f762d414d21356667d19a8564b646a05372739b3fbf13fa278bb20b788
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. This indicates a link farm or distribution mechanism. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to these external resources, likely for SEO manipulation or to serve further malicious content.

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://allisemy.com/uploads/1/3/0/5/130550857/130550857.html#diagrama+de+flujo+ejemplos+de+procesos
    • http://doorjose.nl/uploads/1/3/1/0/131070314/zevofep_mipojazufofok_fegitepafudu_nuwakuvenesoti.pdf
    • http://amsterdamflag.com/uploads/1/3/0/5/130589331/botoxuna.pdf
    • http://hannahclaredesign.com/uploads/1/3/1/0/131071209/namudefedevob.pdf
    • http://aungko.info/uploads/1/3/0/5/130588256/doxanevonogekeveb.pdf
    • http://sehr-geehrte-damen-und-herren.info/uploads/1/3/1/4/131408614/8060750.pdf
    • http://ntdphysiotherapyconsultancy.com/uploads/1/3/0/5/130550748/wetiligujot.pdf
    • http://lovegoddessamber.com/uploads/1/3/1/4/131438062/miluwarojimubu.pdf
    • http://where2vacations.com/uploads/1/3/0/7/130776106/5368180.pdf
    • http://emellislandscape.com/uploads/1/3/0/9/130969944/mokuvo_xokozutofumo_lalolonapiluxok_gajokirenumewe.pdf
    • http://swanchiropractic.com/uploads/1/3/0/2/130289669/123260.pdf
    • http://maquinarianabuursshapingthefuture.com/uploads/1/3/0/7/130776175/925b005b973031.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_off00007455.bin
610c4547c7437db61468688a8d2a2eccd5cf1e82eb4f65e9d784ac74e27084f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7455 9628 bytes

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