Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c48614524305cf6…

MALICIOUS

PDF

42.6 KB Created: 2020-06-03 21:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c54b0f16ff4893bf6ac0a0ea677df49 SHA-1: 253c245cbdd531348287ad1273fe6160f8890dd8 SHA-256: 9c48614524305cf6dcce259b4d1217988c4374788d5f076871d831dde055d81b
92 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or redirection to malicious content. The document body, though heavily obfuscated, contains text related to a 'chemistry lab report example college' and references the wkhtmltopdf tool, suggesting a lure to a fake academic resource. The primary attack pattern involves directing users to numerous external URLs, likely to host further malicious payloads or engage in SEO spam.

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://ruben-moss.pleasingfood.com/uploads/1/3/0/4/130476502/130476502.html#chemistry+lab+report+example+college
    • http://christine-carson.com/uploads/1/3/0/6/130621309/kejilef-borodevowanav.pdf
    • http://dswinbyweb.com/uploads/1/3/0/8/130815080/tigomukutu.pdf
    • http://hairbyellieand.co/uploads/1/3/1/3/131379219/nipojexugapej_fefep_radisebew.pdf
    • http://jasonhsieh.com/uploads/1/3/0/5/130545334/kurutibot.pdf
    • http://thedigitalbrickyard.com/uploads/1/3/0/7/130739141/9379692.pdf
    • http://mansonsroofing.net/uploads/1/3/1/3/131380612/a6cd67.pdf
    • http://fallingstardusk.com/uploads/1/3/0/3/130324192/woxajarukukowexelup.pdf
    • http://pineandsparrow.com/uploads/1/3/0/9/130969424/6968160.pdf
    • http://ruben-moss.pleasingfood.com/uploads/1/3/0/4/130476502/terms.html
    • http://ruben-moss.pleasingfood.com/uploads/1/3/0/4/130476502/dmca.html
    • http://ruben-moss.pleasingfood.com/uploads/1/3/0/4/130476502/policy.html
    • https://xebamobakur757036922.files.wordpress.com/2020/06/nuvasigufaf.pdf
    • https://videmenig247730254.files.wordpress.com/2020/06/lowazemakavuketugokebaxiz.pdf
    • https://dedokufon.files.wordpress.com/2020/06/tupavok.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_off00007ae1.bin
097da5de8b34f4f04446deb141f6b54e93213478db89cd00f3e5d1d1097fdd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE1 10424 bytes

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