Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a0580a1707bb4f…

MALICIOUS

PDF

58.6 KB Created: 2020-05-24 00:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb55eef0db3947717fb7611ae5628bdf SHA-1: fe2d3b5ee8af11fe7e5242d42d6f5f06bcccec69 SHA-256: 77a0580a1707bb4f84e522a684f20c32521ef0c735bb005c81809a6dcdd2aed2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of potentially malicious websites hosted on various domains. No scripts were extracted, limiting the analysis of direct payload delivery.

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://x0903667xstreamtravel.xsideas.com/uploads/1/3/0/6/130604741/130604741.html#harvard+undergraduate+research
    • http://explorepassover.com/uploads/1/3/1/4/131453456/gisigumutoteju_tosixuwe_muvalivabopo.pdf
    • http://mail.dingmac.com/uploads/1/3/0/4/130477584/f29a99e.pdf
    • http://adaptiveavsolutions.com/uploads/1/3/0/6/130604821/81ad95.pdf
    • http://homebodyandthenomad.com/uploads/1/3/0/4/130476684/a6419f5ab.pdf
    • http://aperfectday.rocks/uploads/1/3/0/2/130272577/11967.pdf
    • http://fromtheheartliving.com/uploads/1/3/0/6/130621101/319a1ca4b6d.pdf
    • http://jensugdenphotography.com/uploads/1/3/1/4/131454158/7957464.pdf
    • http://robinosos.com/uploads/1/3/0/4/130483645/bonekapezetul-bofed.pdf
    • http://anadarkobasinllc.com/uploads/1/3/0/4/130436020/ramosavivaxaruso.pdf
    • http://rgbatiment.net/uploads/1/3/0/7/130776111/vatoji-wivapobexow.pdf
    • http://dailypersonalfinance.com/uploads/1/3/1/0/131071151/xesivokuk.pdf
    • http://wakeboatporn.net/uploads/1/3/1/4/131438294/vinaseriw_siwusaxenituzet_patef.pdf
    • http://tomsfood.com/uploads/1/3/0/7/130775352/86d4131c44.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_off0000b90f.bin
4cecdb961daadc2443301a7af4f0b54ac5bfbb4b941d4cf8c4d55fd947ed5e79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB90F 11008 bytes

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