Malicious PDF — malware analysis report

Static analysis result for SHA-256 c145106293489dbe…

MALICIOUS

PDF

67.3 KB Created: 2020-03-07 09:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7ec2d968722ea4b55a91785cc0ea741 SHA-1: 0a98f11a504bcb8bb0f52b0cfb03b831008e363e SHA-256: c145106293489dbe2990f877160af86938dd60d76f5e1d79185790b26020f509
92 Risk Score

Malware Insights

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

The PDF file was generated by wkhtmltopdf and contains numerous external links, indicating it is part of a link farm or SEO scam. The primary lure appears to be 'Epidemiologia del cancer gastrico pdf'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are likely used to redirect users to malicious content or phishing sites.

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://adsl-63-204-18-57.benefitplans.org/uploads/1/3/0/6/130605089/130605089.html#epidemiologia+del+cancer+gastrico+pdf
    • http://www.rlassociates.net/uploads/1/3/0/2/130287281/2514342.pdf
    • http://charlwoodinteriorsltd.com/uploads/1/3/0/5/130588415/e9bb4c3f197.pdf
    • http://www.atlartchurch.org/uploads/1/3/0/7/130776143/simeko.pdf
    • http://narrins.com/uploads/1/3/0/4/130478566/9714597.pdf
    • http://ghcrew.com/uploads/1/3/0/4/130483198/gawabow.pdf
    • http://qedsjc.com/uploads/1/3/0/8/130814179/9456434.pdf
    • http://resolvenetwork.net/uploads/1/3/0/2/130289239/057404e64.pdf
    • http://purpledoorfilms.com/uploads/1/3/0/3/130323097/690ead959fc.pdf
    • http://outsiderartauction.com/uploads/1/3/0/3/130379163/f01e2c0633d3e.pdf
    • http://newmoses.com/uploads/1/3/0/6/130621608/370440f9699a.pdf
    • http://cpanel.shirebourne.com/uploads/1/3/0/2/130288549/264869.pdf
    • http://www.diogoperdigao.com/uploads/1/3/0/2/130270742/romosobutum.pdf
    • http://topviewfilmsociety.com/uploads/1/3/0/8/130813897/1e82820bd748.pdf
    • http://somvet.org/uploads/1/3/0/7/130775830/tobaxejuf.pdf
    • http://baldwinadvisor.com/uploads/1/3/0/7/130775805/kujulazi_fizavivuwom_rejokav_jedigamal.pdf
    • http://tierisch-tragbar.de/uploads/1/3/0/6/130620632/b189c6933.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_off0000d979.bin
0bfc14098891d25a28447ee53d7797f408e6303dc565b36659d13e998afece39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 10152 bytes

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