Malicious PDF — malware analysis report

Static analysis result for SHA-256 920061ae5646a65d…

MALICIOUS

PDF

34.2 KB Created: 2020-05-16 19:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af8dae128d5f1f1c467855dff1440385 SHA-1: 38959c8a286a5848af3b0f93a18dcf80dde92b41 SHA-256: 920061ae5646a65dd6bcf2882782b247ad63217e04ec320f141edf8ec728967b
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, also contains embedded URLs. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://beingself-centered.com/uploads/1/3/0/5/130547659/130547659.html#classical+and+modern+fourier+analysis+pdf
    • http://bestgatorcuvonline.com/uploads/1/3/1/3/131379776/2741792.pdf
    • http://jialinzhang.com/uploads/1/3/1/8/131856622/7324012.pdf
    • http://dirtbagcoffin.com/uploads/1/3/0/6/130605430/5683064.pdf
    • http://rubberbymok.com/uploads/1/3/0/9/130968985/8622284.pdf
    • http://bestlawyerhouston.com/uploads/1/3/0/4/130478205/putogasenod-riguxatejubafo-kedozutumu.pdf
    • http://upgraderooms.com/uploads/1/3/0/5/130551114/dezudot.pdf
    • http://poweltonconstruction.org/uploads/1/3/0/9/130969206/miwijevogerum_rukevamovo.pdf
    • http://tnknutson.com/uploads/1/3/0/6/130622077/sefazek_kumavimerigo_wevowixepu_sipage.pdf
    • http://jtremodelingllc.com/uploads/1/3/0/8/130814193/vepiduredivobom_momov.pdf
    • http://ryanmariano.com/uploads/1/3/0/8/130874671/pukupasipigupogoma.pdf
    • http://eliseimages.com/uploads/1/3/1/4/131454556/dc4ee9918cf5.pdf
    • http://drisenproducts.com/uploads/1/3/1/4/131454270/lowar_basinolok.pdf
    • http://aelianfinance.com/uploads/1/3/0/6/130639669/pimemepadom.pdf
    • http://risenindustries.com/uploads/1/3/0/4/130476581/zenewitewine-fapafavos.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_off00005a20.bin
25a9cf78d376c1b1de6f537f35b4ddebc071a6e06c9f08a5f4109484585ba97c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A20 10776 bytes

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