Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd77b5b3b6012c52…

MALICIOUS

PDF

36.4 KB Created: 2020-04-14 13:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a402742a82c81501bec9260e8acf525d SHA-1: d2fa06105b5c081d6964b0f72625af2e9097ac55 SHA-256: dd77b5b3b6012c52c3d14bf8712d3b25ad2bf6e4cc04e65a96994fa897b4a80e
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though malformed, contains text related to 'Subordinate legislation act guidelines' and references the wkhtmltopdf tool, indicating a potential lure to external content. The ML classifier strongly flagged this PDF as malicious.

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://hydeparklocal.com/uploads/1/3/0/7/130740553/130740553.html#subordinate+legislation+act+guidelines
    • http://innovativelearninggroup.org/uploads/1/3/0/4/130483263/fojawej_rukoladevabibed_sezudegakisun_vavoja.pdf
    • http://smartcmr.com/uploads/1/3/0/2/130288798/c7a4a16ee34e.pdf
    • http://nzwildlifeartist.com/uploads/1/3/0/7/130776451/tovota-nukozi-kilepufalutaf.pdf
    • http://cfobookkeeping.com/uploads/1/3/1/6/131637701/6647498.pdf
    • http://moderndynamics.org/uploads/1/3/1/4/131406491/fadokurugofefog-bolafuxanikabo-remifisiwa.pdf
    • http://sheiscrafty.shop/uploads/1/3/0/7/130775475/domalo-zofetagumod-pozilunitubil-bimave.pdf
    • http://goodgirlsjewelry.com/uploads/1/3/0/9/130968913/53c8c4a1b9.pdf
    • http://micatholichomeeducators.com/uploads/1/3/0/5/130551839/be23c9.pdf
    • http://flicksi.com/uploads/1/3/0/7/130739601/ae17c462.pdf
    • http://sh4all.org/uploads/1/3/0/6/130603811/zawifovuzesi-kobutasarava-tobawomibo.pdf
    • http://caloundramowing.com/uploads/1/3/1/4/131438164/nigisunutipeluj-larofosixif-xusakixin.pdf
    • http://borderpatrol100.com/uploads/1/3/0/3/130312996/471f85967a5.pdf
    • http://kafaatt.com/uploads/1/3/0/2/130270951/nunux-batakepejogo-ganiloru-sefazojizonu.pdf
    • http://jemfloorcovering.co/uploads/1/3/0/5/130540017/d69666.pdf
    • http://flicksi.com/uploa
    • 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_off000065f9.bin
c6882ae96325b9cca669c82c2150b9e8b5be00c9963bf07921961811ed281322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 8036 bytes

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