Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba55d02e3ec4bfb…

MALICIOUS

PDF

43.1 KB Created: 2020-04-01 20:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28de5fa82bbc12fc1172b3d1832e8575 SHA-1: ec5b4f748e2ed7ec56f29782fdd9b9c748d7017e SHA-256: 0ba55d02e3ec4bfb4cd98644c48eaea2b271b3c35caa3e9aea5ee9395f9e8aea
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest a link farm or distribution mechanism for further malicious content, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://spankingmoviereview.com/uploads/1/3/1/0/131070389/131070389.html#valores+z+para+niveles+de+confianza
    • http://tayssir.ca/uploads/1/3/0/5/130539016/c8edbfc143ef4.pdf
    • http://campweempower.org/uploads/1/3/1/4/131438592/3438164.pdf
    • http://proguardga.com/uploads/1/3/0/5/130550800/f3e143b4f65.pdf
    • http://mrsfrasquitadavis.com/uploads/1/3/1/3/131384589/fidosegalevasew.pdf
    • http://maralynnphoto.com/uploads/1/3/0/3/130323425/wewemaponur.pdf
    • http://scetou.com/uploads/1/3/0/5/130545278/bazonopuwewuvimoma.pdf
    • http://painawayallnatural.com/uploads/1/3/1/4/131453451/0af8fe5a338.pdf
    • http://mrsbhatt.com/uploads/1/3/0/5/130545278/sijobob.pdf
    • http://masterguardians.com/uploads/1/3/0/6/130620263/pupamawagarijed.pdf
    • http://kiju-nature.com/uploads/1/3/0/2/130270740/tusojigeku.pdf
    • http://thrivingdisciple.com/uploads/1/3/0/6/130604546/ratepixofulidowuwewo.pdf
    • http://natru.net/uploads/1/3/0/2/130288603/da7146.pdf
    • http://pistachiomustachio.com/uploads/1/3/0/7/130776403/xulejogitu.pdf
    • http://americasautoadvice.com/uploads/1/3/0/2/130271108/14be81ef4.pdf
    • http://everydayblondemom.com/uploads/1/3/0/7/130776138/mutoduxejusokalit.pdf
    • http://theinterdependentorganization.com/uploads/1/3/1/1/131164174/3f7ee3.pdf
    • http://weddinginvermont.info/uploads/1/3/0/6/130621330/dad263.pdf
    • http://skylerdeckard.com/uploads/1/3/1/3/131379564/beca8165988885.pdf
    • http://2019artfinalregan.com/uploads/1/3/0/7/130740255/7806705.pdf
    • http://prbyterri.com/uploads/1/3/1/3/131383650/3596162.pdf
    • http://shipley-munson.com/uploads/1/3/0/6/130620613/3614398.pdf
    • http://petmobliegroomingnewjersey.com/uploads/1/3/0/6/130620508/4bda129e.pdf
    • http://lorettakschmidgallod.com/uploads/1/3/1/0/131069950/5027564.pdf
    • http://clarencetownprogress.com/uploads/1/3/0/5/130551239/kilasozujut_zasaxufaxegu_jepokefuxeko_lisifivu.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_off00007b58.bin
94147dee35d95c067b34a5c37d07f76343b1572f51ea8a01df9abab56a2a8847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B58 9912 bytes

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