Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a27655a2c56310…

MALICIOUS

PDF

40.7 KB Created: 2020-03-29 15:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 05d44f47146a6407ad147c720ef29aab SHA-1: 679842521b34564e55ece7f9e1ab4c90b614ea03 SHA-256: a2a27655a2c56310022d6b885789042b9f2060131677099a23895d6bc92931a1
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains a title related to dramatic plays and references the wkhtmltopdf tool, suggesting a lure to potentially malicious content hosted on the numerous extracted URLs.

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://74-123-73-55.mgwnet.com/uploads/1/3/0/2/130274017/130274017.html#obras+dramaticas+cortas+de+3+personajes+mujeres
    • http://www.stressedoutsoul.com/uploads/1/3/0/5/130588798/masixun.pdf
    • http://studiobrickhouse.net/uploads/1/3/0/6/130621304/dizereruxe.pdf
    • http://squirrellysheep.com/uploads/1/3/0/7/130739322/wejodenigunegi-bixiveredomujex.pdf
    • http://powhere.net/uploads/1/3/1/1/131163690/d3b356df40a074.pdf
    • http://greatereastimports.com/uploads/1/3/0/6/130639872/fomuridefol.pdf
    • http://cascadeladyhoops.com/uploads/1/3/0/6/130604631/kixotujexog.pdf
    • http://brunchdelivered.com/uploads/1/3/0/7/130776572/bujoruzusidifopal.pdf
    • http://rimmermusicgroup.com/uploads/1/3/0/2/130288320/gemodofexodifo.pdf
    • http://itsnothingood.com/uploads/1/3/0/4/130435960/040a5c7a77d.pdf
    • http://leewadeaccountants.com/uploads/1/3/0/5/130590666/0ca2904d7a539.pdf
    • http://pastoraaronowens.com/uploads/1/3/0/7/130740464/ranipepufa_zujupilewel.pdf
    • http://pitmonperformancecycles.com/uploads/1/3/0/5/130546742/9277670.pdf
    • http://jean-frank-stark.com/uploads/1/3/0/4/130488157/7631981.pdf
    • http://minuku.com/uploads/1/3/0/2/130289379/1555682.pdf
    • http://staywright.com/uploads/1/3/0/6/130639304/693593ea5fe.pdf
    • http://friendsoflakebarkley.com/uploads/1/3/0/6/130639774/xumamebava.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_off00007219.bin
4baa1c3543103f5a4bff8aaf80b3f0ec5b0b77de30cee7343f4691708cc24405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7219 9316 bytes

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