Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67e1728a025ee9d…

MALICIOUS

PDF

38.2 KB Created: 2020-03-24 01:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a447e46a3fbdc860242aa1ab27de476f SHA-1: ceceae56949ddf71a3a66d6970ddd270478b4f41 SHA-256: b67e1728a025ee9d30be855ed9b895ffd90706f9eb02fe5538882f856a43a44e
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect users or manipulate search engine results.

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://naturaltolife.com/uploads/1/3/0/7/130738966/130738966.html#corpus+luteal+cyst+during+pregnancy+babycenter
    • http://2001ndivisionharvard.com/uploads/1/3/0/5/130588676/ruwamimawedit-kinefuvoxewo.pdf
    • http://lesacramento.com/uploads/1/3/0/7/130776344/793528.pdf
    • http://homesweetsecondhome.com/uploads/1/3/0/3/130379504/8236422.pdf
    • http://elizabethlopez.net/uploads/1/3/0/6/130621096/2308117.pdf
    • http://www.griffinplandev.com/uploads/1/3/0/9/130969186/6024996.pdf
    • http://gracesuccessacademy.org/uploads/1/3/0/7/130739633/2853019.pdf
    • http://www.servicepartnervanderveenassen.nl/uploads/1/3/0/3/130313582/zumuxeratem_bedazazaw_rusaxijodapu.pdf
    • http://www.acupuncturecity.acupuncturevegas.com/uploads/1/3/0/8/130873826/821357.pdf
    • http://mindbodyevolution.org/uploads/1/3/0/3/130313272/videkasirilemol.pdf
    • http://mta-sts.mail.meetthemessenger.com/uploads/1/3/0/7/130776749/kokimosefa.pdf
    • http://hygieneni.com/uploads/1/3/0/6/130605506/lavorixe_togupor_vaxokaxab.pdf
    • http://sousmarine.de/uploads/1/3/0/2/130291536/sitomaviladunaduj.pdf
    • http://www.engelwrite.org/uploads/1/3/0/6/130604793/4226974.pdf
    • http://coupleseftcenter.com/uploads/1/3/0/4/130435702/zokopofededu.pdf
    • http://icloudstore-apple.com-unlocked-valid-account.com/uploads/1/3/0/2/130289229/2281325.pdf
    • http://leftbankwritersdenver.com/uploads/1/3/0/5/130540065/lowawazex.pdf
    • http://safetori.fi/uploads/1/3/0/5/130544953/1510773.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_off00006bcc.bin
2d0388120ec3632caf588dc906570b3ef4aa0848d37d66b8a49adc7ef912dcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCC 7500 bytes

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