Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd55027381ade0f…

MALICIOUS

PDF

36.0 KB Created: 2020-06-20 13:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0b42e1d8fdfa31c2f3214ede166274 SHA-1: 96b50043a25d877a1570b1208ddd552e49033564 SHA-256: 9dd55027381ade0f08843eed11ae8e47a9bf0282bf9651eff8f8451630152df0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The document body presents a tutorial lure to mask the malicious intent. The ML classifier also strongly indicated maliciousness. The primary IOCs are the numerous external URLs embedded within the document.

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://orionenergygroup.net/uploads/1/3/1/0/131071167/131071167.html#tutorial+membuat+sofa+dengan+3d+max
    • http://amvassallo.com/uploads/1/3/1/6/131606482/ee4e7891eee43a.pdf
    • http://74-123-75-152.mgwnet.com/uploads/1/3/0/6/130621101/pojurakibitiputulov.pdf
    • http://thegardencenterinc.org/uploads/1/3/1/3/131380915/tugovoxoxepazanumo.pdf
    • http://chasworldhearts.com/uploads/1/3/0/6/130604539/dc347308dbe4.pdf
    • http://flightacademysdw.org/uploads/1/3/1/4/131408614/buboselaremoti.pdf
    • http://legenthology.com/uploads/1/3/0/4/130478106/ruvawib.pdf
    • http://adsl-63-204-18-26.benefitplans.org/uploads/1/3/1/4/131406547/juwedowun.pdf
    • http://r.riveroaksveterinary.ca/uploads/1/3/1/4/131411600/1815383.pdf
    • http://viandas.org/uploads/1/3/0/2/130274024/3790580.pdf
    • http://hostmaster.kidwellybowls.com/uploads/1/3/0/6/130604312/9234830.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e4e.bin
f1c959810f22027e21b2ad0f5de2e710cf539877330482d929d70a98c157658c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4E 5432 bytes
font_01_sfnt_off000060ad.bin
4b43e168f1487d44d0b0cf544d1d688619dd1291269b9dd474c1f93e87fa6d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 10312 bytes

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